Umair equates a large welfare state with a successful nation. More specifically with the cause of their success. Clearly this is not the sufficient distinguishing element to be a successful nation. If it were, then North Korea would be successful.
He goes on to state that we’re thinking too hard. He says that when we try to actually quantify the success of a program we get lost. Thus, instead of studying social programs, we need to just go with our opinion.
I am fully aware that better arguments for socialism exist. That does not give him carte blanche to insist the rest of us can just stop thinking.