How exactly do you explain the Republican passing Medicare D? That was there Obamacare, though it was more a scheme to throw money to their backers in big pharma than anything. Obamacare is a market solution to Health care.
The mammoth TARP bailout of big banks was a one one of the most massive interventions in the economy ever and it was Republican lead. Your thesis simply doesn't hold.
Democrats are throwing just as much money to defense and intelligence since 9/11 as the Republicans. Feinstein, a Democrat, and Leibermen a former Democrat were point men in giving away our civil liberties to the NSA and DHS. In case you haven't noticed most of the big wars in the 20th century were started/fought by Democrats, Vietnam being the worst of the lot.
There are a bunch of wedge issues the two parties differ on but they are mostly designed to herd people in to the two parties and make them think they have a choice wben really they don't. The wedge issues are unions, abortions, guns, gays. They are emotional hotbutton issues designed to divide people but yhey have very little to do with the stuff that really matters, who controls the power and the money (with the possible exception of unions). Reagan mostly broke the backs of unions and they matter less and less every day outside of government employee unions.
Republicans are traditionally friendlier to plutocrats but I seriously doubt there is much difference between the two in pandering to rich people. Dems tend to pander to Hollywood celebs and trial lawyers, Republicans to Texas oil men, but they are just pandering to which ever group of rich people will fill their campaign war chests.