Your second paragraph is really interesting and I feel like there are several misunderstandings derived from a flat american left-right political understanding

Your second paragraph is really interesting and I feel like there are several misunderstandings derived from a flat american left-right political understanding that doesn't really map. The first is when you say "left wing" you probably mean something more like liberal democrats, which are not meaningfully leftist in a global context and not as far left as the american right is far right. Something like the black panther party or sandinistas is left wing, and more or less necessarily incompatible with the sort of engaged business-centric capitalism you're expecting. You can have a thin blue line bank but not a redistributionist one you see what I'm saying? To the extent something like that exists it is just left-themed, which definitely do already exist, and will eventually collapse under its commitment to capitalism and become functionally like any other agency in its domain. The second is that it's probably not true that the left is more ideological than the right. Both groups will believe this about the other probably, and I certainly have my opinion. But for example undermining a high-value public good merely to deny access to an opposed group is a classic right-wing tactic that is deeply ideologically motivated. The right's ideology especially around economics & money tends to be a lot closer to the mainstream of american culture. This is a distinct advantage in business! Again, a thin blue line bank has no ideological inconsistency and may thrive in the right environment.