I'm not so interested in punishing the banker class as you seem to be. I just want them held within bounds. I take the view that they consider Warren to be the plausible threat.
That's the difference between the two candidates in a nutshell. When Warren talks about her plans, she frames it as speaking to the manager of a restaurant because the service wasn't up to par. When Bernie talks about our movement, it gets people asking whether billionaires should even exist. Incremental reformism versus structural change. Asking for a loaf of bread knowing you'll only get half versus asking for a slice without realizing you'll probably get crumbs.
I'm not in favor of eliminating billionaires per se. I believe in capitalism. But we don't have capitalism when large segments of society have no hope of ever having enough wealth in order to invest in opportunities when they become available. Which is what capitalism actually means. So redistribution or whatever else it takes so that everyone has that opportunity sometime in their adult lives. The call to eliminate billionaires is attacking the symptom. I'm not in favor of socialism. The left has been duped by the right into accepting their definition of the term. It's a straw man. It's gaslighting. And I'm tired of having to defend whatever it means to be a democratic socialist.
Privatized gains versus socialized losses for the Wall Street bankster class
Internalized profit versus externalized risk and expense for the "job creator" class
Socialism for the aristocracy versus laissez-faire capitalism for the masses
This place we're at, now, it did not just arise on it's own, as a "natural" market phenomenon.