Government, Parliament and the Centralisation of Power: If stability is what you want, you must resist the Government's attempts to strip power from Parliament

Parliament is back in session this week and the neverending turmoil inside the Conservative Party continues. In doing so, it exposes one of the primary weaknesses of a presidential system - and one of the reasons why the UK doesn't have one.

Or rather, why the UK doesn't have a presidential system in theory, at least. During the Tory conference, Theresa May's disastrous speech contained an apology for running too presidential an election campaign. But the grounds for such a campaign have been long in the preparing and only exposes the dramatic shift towards the centralising of decision-making at westminster.

This is a trend stretching back decades and is one of those trends for which New Labour were particularly criticised for not reversing. Even while some powers have been devolved, the Cabinet has continued to accumulate power at the expense of Parliament.

Theresa May's Government has threatened the most drastic veer into excluding Parliament in recent times, with parts of the Brexit Bill. The bill sparked controversy for potentially allowing the Government, embodied in the Cabinet, to make major changes to the law - even to the constitution - without first submitting them to Parliament for scrutiny and vote.

There defense amounted to 'we'll be responsible with that power', but that isn't enough. This is just the latest step in a long term trend. Parliament has been getting weaker for decades and with it has come a, perhaps unintended, consequence: instability.

In the strictest terms, the constitutional and governmental powers of the United Kingdom are vested in Parliament. It is the supreme authority in state. Collectively, the power of the state is embodied by - primarily - the Members of Parliament in the House of Commons.

Theresa May promised a state that was strong and stable centred on her personal rule. So did David Cameron. And neither on them has been able to deliver. In the late twentieth century and the early part of the new millenium, there were brief periods when the winds were just right, or the two party system rigid and exclusive enough, that singular leaders could stick around for a while.

But betting on stability rooted in the personal longevity of a single person would get you long odds and for good reason. Power embodied in a single person or a single party is inherently unstable, because their power base is fundamentally just a fraction of the people of a country.

That the power of state is, in theory, vested in Parliament is above all a reflection of the futility minority rule. Theresa May can never offer stability if power is not rooted in inclusive, democratic assemblies.

As her speech showed, power hangs on a thread. A persistent cough can weaken the power of one person. And if that person must embody the state and all it's people and power, you start down a dark road that leads nowhere good.

When the Brexit Bill returns, MPs - especially Tories - must be brave enough to resist to flagrant concentration of power. If for nothing else, to put an end to a trend that has guaranteed a near permanent condition of instability that affects everyone.