You’re discussing raising corporate or individual income tax rates.

I’m discussing a proposed broad wealth tax on unrealized gains and assets.

The tax rates of the 50s were high, but were filled with loopholes and deductions in that the effective tax rate that was actually paid was much lower.

There are arguments to be made how much those policies contributed to the boom of that decade, but those are separate to arguments about the practical, legal, or efficiency concerns with just imposing a 5% levy across all assets and net worth