They go where the votes are but they recognize that votes seem to correlate with money. If you want them to do otherwise, you need to get the big corporate money out of elections. The best way to do that is with tax funded elections but we're too stupid for that. We have the democracy we deserve.

In any event, let's say we didn't have half the country, the right, consistently begging the congress to give more money to the rich and deregulate. Would not still have the regulations that kept us from having all the financial catastrophes that we've had since Reagan? Would we not have regulated derivatives? Would we not have stronger environmental protections? Would we not have the CPA?

So, in absolute terms there's truth in what you say but in relative terms there's a vast quantifiable difference between the two parties.