I guess it escapes his notice that gov’t. efforts to eliminate poverty hasn’t worked,except maybe to create huge gov’t. debt.
More likely, like most leftists, socialists, and communists (the non-professional variety of communists) he likely thinks it just "hasn't been done right" yet.
They all think THEY can make it work, the same way every new crackpot of a generation thinks they can make a perpetual motion machine. They think "All the "others" who tried it and failed are just stupid..."