Likely waterfall of what CEOs would do if politicians made stock buybacks illegal.
First, private companies would be less likely to go public, as they can't manage dilution.
Current public CEOs would, in likely order:
1. Pay higher dividends
2. Pay special dividends
3. Pursue more mergers and acquisitions
4. Hoard more cash
5. Pay down debt
6. Overinvestment in marginal R&D and capex
or just go private.
Accomplish what you're looking for? No, of course not, but it sounds good as a boogeyman!