I believe the 'you' in "you voted for them" is the plural. That is, you and your neighbours and friends voted for them.
I don't like it either, but like you, I can't be arsed to go out and canvass my neighbourhood on the merits of the Pirate Party (or even just to vote for someone other than the incumbent). Hence, like you, I have got exactly the government that I voted for.
As an aside, lots of people here in the UK have been voting for UKIP. As far as I can tell, the majority of UKIPs manifesto is that they want to 'rebalance' immigration so that we have less immigrants. Once UKIP started getting voted into small seats, the 2.5 major parties all started talking about their new plans to tackle immigration, whereas before that they'd just shrugged it all off as nonsense (hell, Labour actively encouraged immigration so that there would be a whole new generation of Labour votets, and even they are now talking about curbs on immigration). The point here is of course that you don't necessarily need to replace the incumbents, but actually just make them alter course a little. It all still means getting off your arse, and that's where my whole argument falls down because none of us can be bothered.