I think the prime reason for the disconnect between the electorate and those it elects to represent it is our electoral system.
People say FPTP provides strong government, but it could equally be said that it usually allows one political party, once it's reached the critical mass of 36% of the votes cast, to do pretty much what the fuck they want for half a decade. How can that be healthy for our democracy? How can that truly represent the will of the people? Is it any wonder that politicians don't feel they need to listen to the electorate, especially when they've got a safe seat? They know they don't need to listen because our voting system protects them from having to.
I know attenuated electoral reform was put to the electorate half a decade or so ago, but the political landscape has hugely changed since then. It's hugely changed in the last week! As much as I dislike their politics, the number of MPs UKIP have compared to their share of the vote at the last GE is an absolute disgrace and hugely undemocratic.
We desperately need to change our broadly nineteenth century political system, and if we do, perhaps the calibre of politician will improve accordingly. It's got to be worth a shot, surely.