This is tiresome, but I'll correct some of your basic errors and misunderstandings.
We can vote for a representative every four years
The House of Commons has a
maximum term of
five years. Usually elections are more frequent than that.
and thereafter we have no opportunity to hold them to account for decisions they make for another four year.
Not true at all. Firstly, we have a representative democracy, not an direct democracy. To my mind this implies that the representatives we have elected should have a reasonable chance to get on with the job without the threat of summary removal.
However, this does not mean we cannot hold our representatives to account. Our country has a healthy political culture in which the government, the political parties and individual MPs can and are scrutinised and criticised by the public, the media and of course, other politicians.
To suggest that once elected our MPs or government then do exactly as they please is a very long way from the reality of the various immediate and long-term forces acting on them.
But, it's worse than that. The government - ie the cabinet - is appointed and doesn't have to be elected.
It has become the convention in our system that the vast majority of ministers, including cabinet ministers and always the prime minister, are elected members of the House of Commons. So nearly all these people are elected. You could argue that ministers should be directly elected to their roles, though I know of no country that does that and the benefits of such a system are unclear. It would certainly fundamentally change the relationship between parliament and the executive which is central to our constitution. New Labour have been keen on reinforcing the separation of powers where it has suited them (eg. changing the role of the Lord Chancellor) and less keen where it hasn't (special advisers, scrutiny issues, centralised micromanagement in the delivery of public services, politicisation of the police, etc.)
Then it gets worse still. The people we have directly voted for every four years only get to question the govt for a tiny percentage of the time parliament sits, and only with questions that are pre-submitted 24 (or is it 48?) hours in advance.
The various measures which New Labour implemented to diminish the capacity of Parliament to scrutinise the executive are regrettable and could easily be, and I hope would be, reversed by the next Conservative government.
Does it get worse? Yes. behind the government is an army of unelected permanent civil servants who do the majority of work in drawing up policy.
The independence of the civil service is an incredibly long-standing convention and a huge benefit to the country. What are the alternatives? Shunting out the whole civil service (or at least the policy-making parts) and replacing them with political appointees every time the government changes hands? Recent years have seen the independent civil service being undermined both by appointed political special advisers (which Tony Blair kindly gave authority over career civil servants) and to a degree sidelined by political parties' greatly increased own policy-making capacities, both in-house and via the numerous think-tanks, business lobbies, trade unions, etc.
But whatever you think of this (and I certainly don't like it), ultimately it is the elected government that makes the decisions.
And behind all this sits the armed force of the state, so if we ever decide we're so p- off we try to change something by more direct means, we get whacked.
This is entirely characteristic and necessary for a true democracy. The civil power must maintain a monopoly of violence so that the law can be implemented through force if necessary. The alternative is to have a place like Pakistan where the army tends to be loyal to a particular faction regardless of who is elected to government, or to have various militias and paramilitary forces which can oppose or undermine the official armed forces and make it possible for warlords or unelected political groups to control territory in an entirely undemocratic fashion.
If that's the best democracy you think is possible on this planet then you're ignorant or a fool.
It doesn't happen perfectly, and importantly, cannot happen perfectly because it is a fallible, imperfectible human system.
Note that
imperfectible doesn't mean
unimprovable.