you make your case. Show me in the constitution where the government is allowed to keep a standing army. Show me where the constitution allows income tax. Show me where is the FBI, CIA, IRS, and a hundred other alphabet agencies.
They are not there, no they are unconstitutional.
As for Medicare and SS, one could justify those with a loose reading of “provide for the common welfare” but that is technically in the preamble, not the constitution.
It would be harder to find ways in which this government resembles the US constitution, than find ways it doesn’t.