If one looks at European politics with an eye toward official transitions, there is a striking contrast between London and Madrid. In recent years, the 10 Downing Street residence has seemed to feature a revolving door, swallowing prime ministers at a dizzying pace. Theresa May, Boris Johnson, Liz Truss, and yesterday Keir Starmer. All submitted to pressure, packed their things, and resigned before the microphones, compelled by their own colleagues and without the opposition having forged a governing majority.
Meanwhile, fifteen hundred kilometers south, at the Palacio de la Moncloa, the survival manual is diametrically opposed. In Spain, the presidents of the Government withstand parliamentary sieges, dips in popularity, and coalition ruptures. Resigning purely under political pressure, without a formal and binding defeat that brings a ready-made successor or a defeat in a confidence vote, is not part of the normal rhythm of the Spanish political system.
“It is a story of two parliamentary systems: the classic and the rationalized”
Why does the British system devour its leaders while the Spanish protects them? The answer does not lie in the character of the politicians, but in the cold, calculated architecture of their institutional frameworks. It is a tale of two parliaments: the classic and the rationalized.
The Westminster Guillotine
To understand the fragility of the occupant of Downing Street, one must first grasp what motivates those with the power to remove him: the MPs of his own party. The British political system lacks a written constitution that shields the government, but more importantly, it rests on a single-member plurality electoral system, the famous First-Past-The-Post.
In the United Kingdom, there are no party lists. When a British citizen goes to the polls, they do not vote for “the Conservative Party” or “the Labour Party” in abstraction; they vote for their local representative in their constituency. This creates a power dynamic radically different from that of Southern Europe. The British MP owes his seat and his salary to his local voters, not to the kindness of the party leader who placed him on a list. “In Westminster, the Prime Minister is not the owner of the party; he is an employee of his MPs. And if the MPs believe the manager is sinking the company, they fire him before the company goes bankrupt.”
When a British prime minister, such as Boris Johnson after the Partygate scandals or Liz Truss after her disastrous economic plan, begins to plummet in the polls, panic grips the backbenchers. If the national leader’s popularity falls, the backbencher may lose his seat in the next election. His survival instinct kicks in.
This is where the internal machinery comes into play. British parties are ruthless. In the case of the Conservative Party, the legendary 1922 Committee channels this discontent. If 15% of the MPs send a letter of no confidence to the committee chair, a secret ballot is triggered. If the Prime Minister loses it, they are out. Immediately. And all of this happens within the governing party itself, without the Labour Party needing a majority to govern. The system permits, and indeed fosters, regicide as a mechanism of electoral survival. The leader falls into the void with no safety net. In the case of the Labour Party, 20% of MPs cannot force the resignation of the prime minister, but they can trigger primaries to choose a new leader.
Spain’s Obsession with Stability
Crossing now the Channel and the Pyrenees. When Spain’s constitutional drafters sat down to write the 1978 Charter, they bore a dreadful fear etched in national memory: the chronic instability of the Second Republic and the specter of political chaos. Spain did not want a parliament that plays at toppling governments on whim or on mere crises. They looked to Germany’s Bonn Constitution and adopted a rationalized form of parliamentarianism.
The crown jewel of this system is Article 113 of the Constitution: the constructive vote of no confidence. This is the main reason a Spanish president does not resign under parliamentary pressure.
In Spain, the opposition cannot simply tally votes to tell the president: “Leave, we do not trust you.” To topple a Government, the Constitution requires simultaneously presenting an alternative candidate for the presidency, together with a political program.
“The crown jewel of this system is Article 113 of the Constitution: the constructive motion of no confidence”
Imagine a highly fragmented parliament. It is perfectly possible that a broad majority of MPs (say 200 of 350) want the president to resign. However, if those 200 MPs (ranging from the far right to the anti-capitalist left and peripheral nationalism) cannot agree on voting for the same successor candidate, there is no constructive motion of no confidence, and the president endures.
The Spanish Constitution prefers a weak, minority, and worn-out government over a power vacuum. It forbids you from destroying if you cannot build. Therefore, in Spain’s entire democratic history, only one constructive motion of no confidence has prospered (Pedro Sánchez’s motion against Mariano Rajoy in 2018), and it required a planetary alignment of disparate political forces.
Closed Lists in Spain
But the constructive motion does not by itself explain why, in Spain, we do not see the “internal mutinies” so common in the United Kingdom. Why doesn’t the party of an unpopular Spanish president topple him from within, as the Tories do?
“Why doesn’t the party of an unpopular Spanish president topple him from within, as the Tories do?”
The answer lies in the closed and blocked-list electoral system. In Spain, the citizen votes for a party’s slate. The order in which candidates appear on that slate is effectively decided by the party leadership in Madrid (Génova or Ferraz).In Spanish politics, the individual deputy is politically irrelevant. If a deputy chooses to rebel against their leader and call for resignation, they know they are signing their own political death sentence. In the next elections, the leader will simply drop them from the electoral list.
In Spain, deputies owe their professional survival to loyalty to the leader; in the United Kingdom, they owe it to their local voters. The Spanish presidents do not fear their own backbenchers because they wield iron control over who enters and who exits the lists. A palace coup like the one suffered by the British Conservative Party is almost a mathematical and organizational impossibility in contemporary Spanish politics. Let us take a moment to imagine the PSOE’s Federal Committee next Saturday, or an equivalent committee in the Community of Madrid.
Two Psychologies, Two Democracies
The outcome of these two divergent architectures is the creation of two political cultures and two leadership psychologies that are fundamentally different.
In Westminster, accountability is understood as a continuous, brutal process. A leader is strong only as long as they deliver electoral value. The moment they become a liability, political culture dictates that they must “do the honorable thing” and resign. Mediatic, parliamentary, and partisan pressure becomes so intolerable that resignation is the only outlet to keep the system functioning. There is no need for an alternative government ready in the opposition benches; it is enough for the governing party to decide to trigger rapid primaries or for elections to be called.
In the United Kingdom, a leader is strong only as long as they deliver electoral value. The moment they become a liability, political culture dictates that they must “do the honorable thing” and resign
In Spain, by contrast, the system can create leaders who view external pressure as noise. The unwritten manual of the Spanish president dictates exploiting the opposition’s arithmetic impossibility to unite, and waiting for the storm to pass.Both systems have evident pathologies. The British model runs the risk of permanent nervous breakdowns, consuming leaders, swerving economic directions every six months, and generating instability that unsettles markets. The guillotine takes precedence over patience.
The Spanish model, designed to avert chaos, risks getting bogged down in deadlock and institutional cynicism. It allows the survival of governments that cannot legislate due to a lack of backing, yet are impossible to topple because the opposition remains split. A system that rewards survival risks alienating citizens from their institutions, as they watch their leaders cling to power by clinging to the Constitution’s wording.
At heart, both parliaments respond to the history of their nations. The United Kingdom, confident in its millennial institutional continuity, allows itself the luxury of musical chairs with its prime ministers. Spain, still scarred by the fragility of its past, prefers a leader with insufficient backing at the helm to an empty cockpit.
