I don't feel particularly disturbed by it, I guess. What proportion of a country's resources are controlled by whom seems like something the citizens of that country might legitimately want to know, especially when the proportions are large enough to affect matters of public policy.

Incomes aren't public here (Denmark), but our neighbors to the northwest publish lists of everyone's income and net worth once a year, which doesn't seem to have ruined Norway. I don't think I'd find it disturbing if Denmark did the same, though I don't know of any plans to do so. If anything it might increase some government transparency— there are some very large family fortunes (Mærsk, Carlsberg/Jacobsen, etc.) that have longstanding and often rather cozy relationships with the government. It might add some insight into things if the public better understood who controlled which parts of those fortunes.

What if Anonymous donors were funneling billions into causes that were immoral or unethical? Would you not want to expose and shame them?

We need this kind of transparency to keep people accountable for their actions.

Pretty sure you can hide your money if go through a for profit shell company but you don't get the tax deduction. Non profits are open.

Once you start creating trusts and shell companies, it's not personal data anymore.