>but your company revenue/market cap/employee count/majority owner wealth is too high to be eligible to merge

Can you posit numbers for these 4 figures (although I don't know how you could calculate "majority owner wealth" when the majority owner is usually 401Ks and pension funds)? Also, if the goal is to stop a business from getting "bigger", then shouldn't there be a strict cap on the measures, rather than just preventing mergers?

If 1M employees is too many, then the business simply should not be allowed to hire more. If $x market cap is too high, then the business should be forced to issue dividends. If the revenue is too high, then it should be forced to stop selling whatever it is selling once it reaches that revenue.