Literally just don't have the limited liability corporate structure. It's an invention of government to privatize profits while socializing losses.
In a free market, company owners would not be entitled to profits while eschewing liability for the actions of their companies. It would force prioritizing long-term brand sustainability over cutting corners to juice next quarter's share price. And liability would incentivize keeping companies small to manage risk, so there probably wouldn't even be megacorp conglomerates to begin with.
Precision of language is not one of his strengths, but to be fair, "liberal" does just mean "left" to 99% of Americans