It means exactly what it says. There is nothing to show that an ultra-limited government cannot perform the needed tasks for society such as you provide. But I say there's a big difference between a government that provides what's needed for society and the monstrosity that's currently in place in Washington D.C.
When I say something along the lines of ultra-limited I mean I want most of the political decisions that affect my life to be decided on the local or state level before it becomes a federal issue. That's exactly how the US was designed, but that's not the way it is being run now. The federal government actually has a list of things it is to do, by the way Post Offices and Roads are covered so I have no problem with that, but a great deal of what it does goes way beyond that list.
My definition of a ultra-limited federal government? Simple. It's what the Constitution says it is.