Outside of NY and CA, I'm thinking that Bloomberg is a very hard sell.
Didn't a bunch of folks vote for Trump because he's a billionaire? I'd just call not wanting another one as having learned a valuable lesson.
Theres no law or rule against discrimination in general, only against protected groups. Billionaires arent a protected group. [en.m.wikipedia.org]
You might feel try that any and all discrimination is wrong, on a personal ethical level, but i want to keep my right to have standards and make choices.