> If I were tax policymaker, I would force all assets to have a valuation every year, and published in a register, and allow anyone else to buy any of those assets for the declared value.

You and your dad run a plumbing business. Every year you have to pay someone 10k to get a valuation. Then strangers can buy a piece. Do you have an operating agreement? If not he can force a sale if the company.

I don't think this is a great policy.