For clarity I'm talking about net profit on gross revenue, not a capped margin on specific product that would start to eat into R&D and other expenses.Over 90% of all companies fold or go bankrupt. If there is no 10X+ upside to offset the downside, it's a losing bet, and you end up with no companies (those not surviving on government handouts) and thus no jobs in the country. Everybody here eventually loses. Silly idea.
Say it's 20%, a company with $10,000,000 in sales couldn't post more than a $2,000,000 profit. If they get to the end of the year and their costs have only come in at $7,000,000 then they can either invest more back into the company, pay some nice bonuses or declare it as profit and pay 100% tax on it.