The last two points might happen - how do you know? I often see "it will backfire" as a counterpoint w/o any evidence.

> the proposed tax will do nothing more than push the extremely small and mobile group of billionaires to take their business elsewhere

This is often claimed but has yet to be shown to actually be true. Billionaires want to live in the nicest places with the best amenities just like everyone else.

But let's pretend for the moment that it is true. Good. Billionaires are not a net positive influence anywhere.