The "market" then decides how much its worth, and I decide how much I want to enforce it (either by assigning rights to people, or removing them entirely by applying a liberal licence.)
However Harberger taxes require me to _pay_ something first. This means that in practice only rich people have copyright, and aggregators like meta, google and ticktok will take all the profit allowing no legal recompense from me.
Which is almost like what we have now.
The issue with copyright is less about how copyright is assigned, its more about how fucking long it lasts. Life + 25 years is probably enough for almost all cases.
But the "its really bad that an artwork cant be used" sentiment is wrong. I made it, I want to control whos using it. The point is that the owner has the right to choose. Do they want thier artistic vision to be fucked up by someone whos only out for money? Do they want someone who they vehemently oppose to use thier stuff for thier own game? (think politician that you don't like)
So no, Harberger taxes will make the worst parts of copyright default, and limit access to the small people who actually really need it's protection.