Comment by averagewall

It can and does function. It's just that buying off a politician means they use the money to buy off or fool voters. Voters still make the ultimate decision about who's in power. American voters have a tradition of refusing to vote for any candidate that isn't enormously wealthy. They somehow equate advertising spending with "will do what I want". That's their own mistake though, and they experience the consequences themselves. That's the attractiveness of democracy, people get what they ask for so they won't be angry when it doesn't go their way.