A lack of democracy is associated with corruption

The problem with the first-past-the-post voting system is that it protects both of the main parties so each suffers from the same lack of accountability which is present in a totalitarian system. Without any form of democracy (not even fptp) we know that the state will descend into totalitarianism despite its apparently well-meaning intentions. And so this is true also of political parties which have a monopoly on the left and right. Because the parties are confident that the voters will not abandon their party for a lesser one which will not register at the ballot box, both parties in a fptp system are protected from the electorate just as a totalitarian government is protected. This leads to corruption and poor government because without the ultimate threat of expulsion from office parties and politicians will get complacent.