Trumpism has proven that most American conservatives don't want that.
Republicans used to have a strong faction of fiscal hawks who advocated eliminating all the expensive non-military government spending: privatizing Medicare, cutting Social Security, etc. But Trump discovered that you can simply promise to eliminate the deficit while also promising to leave all those programs in place exactly as they are, and people will eat it up.
That left politicians like Paul Ryan in a weird place because they were pushing for a limited government that their constituents didn't want anymore.