If can be just factually and morally correct step of taxing given company for income from given country and thats almost it. Maybe close few biggest loopholes how to hide income while having massive revenues. None of the faangs operate like that, with such move their revenues and stock prices would fall down since part of valuation is based on continuing this tax scam/fraud.

This would spawn few hundred billions globally to start with. Of course tech bros et al would launch some massive PR counter-campaign also here, thats all fine and expected.

Will it solve everything? No but will set a better path for future while helping also right now massively. If you have kids and cared even a little what world they will inherit from us, this is how you build its foundations. Not hoarding money at all costs and fuck the rest since everybody relies on rest for existence and thriving.