[AnthonyMouse]

But this is the problem, right? You can't really do that because governments are supposed to spend tax revenue on things that benefit those in their jurisdiction. The extent of tax dollars not used for this is a measure of government inefficiency and in a perfectly efficient government it would be zero, i.e. the average taxpayer would receive benefits equal to what they pay in taxes.

What they're kind of implying is that they want multinational corporations to pay more than they receive so some other people can receive more than they pay, but they haven't actually specified who or by how much. It would be pretty silly and inefficient to deny large companies the use of government-operated transit systems or police protection, but to make it at all practical you end up creating enough exceptions that anyone can find a loophole.

I feel like the elephant in the room is this. A lot of these huge companies are monopolies or nearly so, and a large proportion of their profit is a monopoly rent. But a monopoly rent isn't attributable to a particular factory or the location of your software developers. It can't be attributed to something happening in any particular jurisdiction because it's actually attributable to something that shouldn't be happening at all, and which doesn't have any corporeal existence or physical location. So those profits naturally get declared in whichever jurisdiction has the lowest taxes.

But the problem is not that the monopoly rent is being taxed in the wrong jurisdiction or at the wrong tax rate, the problem is that the monopoly rent exists. Stop trying to pin it to a particular place and find a way to eliminate it.