Except often a good number of their assets exist in the real world. Businesses, buildings & land. These can be taxed regardless of their global location.
We can find fun new ways to apply horrendous taxes that penalize this behavior but reduce them for those who behave in a decent way. Maybe we start taxing turnover on companies use the Irish double sandwich-whatever trick to minimize tax. Either they play ball and contribute to society or they GTFO and someone else takes their slice
They aren't even waiting for market saturation, they're just speed-running straight into enshittification now