That is the key difference in ideology, though.
Democrats believe the state is responsible for the welfare of the people, should take care of everyone's needs, etc.
Republicans believe that people, communities, and families should be responsible for the people's welfare and that government in an unnecessary and intrusive organization in people's lives. Hardline conservatives believe that Government should only serve to do what is delineated in the constitution. regulate commerce, military, etc. Republicans are stuck on King George as if government will always be an enemy to the people and to freedom. Which I can agree with many times (especially in the age of warrantless search and seizure, drones, etc) but on an overarching sense I do not.
I think that Romney believes he would be an efficient and successful president, I doubt he just wants to do it just to do it. True believer and all that