Competelly agree with your points’ intention here, but if billionaires leave a country and take their wealth elsewhere, then it’s not being invested in that country, which is detrimental. Also they’re not spending money on luxury items or lots of whatever billionaire stuff, paying tax on that and circulating a portion of their wealth in that country etc.

So it’s more like:

billionaires stay in the country, spend and invest in the country and don’t pay tax vs billionaires leaves they dont spend invest, nor pay tax.

My 50pence is there shouldn’t be billionaires in the first place, why does any one individual need that much wealth, it just accumulates more wealth and a lot gets hoarded away from anything productive.