I’m sorry to point out that you’re attempting to refute an argument Krugman didn’t make. He’s not claiming that hypercapitalism hasn’t gone too far and that wealth inequality isn’t out of control. He’s merely pointing out that the data shows that people aren’t as desperate as they feel they are, or at least, how they feel everyone else is. Furthermore, he backs this up with sources.
The fact that we have billionaires is a symptom of a big problem, but Krugman isn’t talking about that. He’s talking about how people feel that everyone is doing poorly when all the indicators such as non-essential consumption rates suggest otherwise.