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.
Every single thing the government does today has been because of laws written by Congress, signed and enacted by the head of the Executive, and upheld by the Judiciary.
How can you even BEGIN to make the claim that it's unconstitutional?
That's the DEFINITION of Constitutional.
Incorrect. Many of things the government does today are done either within or outside of specific purported statutory authority (in the latter case, if there is a theoretical justification, it relates to inherent powers of particular offices that do not require legislation to activate) outside of the scope of theories of justification that have been challenged in the courts. Its also quite likely that at least some things government does today are things that have been rejected by the courts in the past -- and which would be again if they were challenged again (certainly, it stretches credibility to claim that, despite all the past missteps, many of which involved repeats of the same violation, the government has just recently become perfectly compliant.)