Do You think Democrats really intend to pass socially responsible ideas Republicans oppose?

It doesn't appear they do. When Obama had a majority in the Senate and Congress, he let the Public Opttion Go down, he couldn't let taxes for the top 2% expire, the wars rage on... What it really looks like is that it's a charade and democrats play the "nice" left and Republicans play the "tough" right but no one is really there to change anything if it doesn't benefit Wall Street. So why do we let those two party's OWN US. If we had Instant Run-Off Voting (IRV) and threw both parties out the USA would have a better opportunity to create sustainable Peace and Prosperity. Seems to me when Democrats cave, capitulate, Can't and Tried, that's not really the case, they just want US to think they're not in bed with Republicans behind closed doors and both get funding from the same sources. Why do we keep buying into the notion that these two parties where dictated by the Constitution, and we can't throw both of them out? I'm a Democrats but I don't think they really intend to change much and darn sure the Republicans won't.