Maybe he's an extremest (if you consider emulating Norway as extremism) but I don't see that he is a hypocrite. He doesn't say everyone should have the same wealth. He says that the government should do more to give everyone the same opportunity to accumulate wealth, by better access to education, health care, various kinds of social support. The fact that he advocates a tax policy in which he would personally have to pay more tax is not hypocrisy. That is called being selfless. That used to be considered a good thing.
I don't think it's fair to either Norway or Sanders to say his agenda is emulating Norway. His actual policy proposals involve making the federal government a micromanager over the much of the economy.
He wants the federal government to supervise local zoning decisions as part of his Fair Housing proposal, for instance. He doesn't merely want to give everyone equal opportunites. His programs would result in the government deciding what opportunities are available in the first place.
His tax policy btw is probably fantasy. The wealth tax he and Warren propose is specifically forbidden by the Constitution, and would survive a challenge only if the Supreme Court agrees with some very creative lawyering. His sales tax would require yet another level of bureaucracy and hit the middle class hardest.
A Trumpian nickname for him would be Bad Ideas Bernie. At the very least his agenda involves an expansion of government regulation and intrusion into the economy that we haven't seen in the US since FDR's New Deal.
