I don't have an answer for you. But, like with most problems, that is one that would likely solve itself through some kind of innovation that an interested party would come up with.

I'm not interested in explaining why market socialism is the bestest most perfect and flawless ideology ever, because it isn't. Obviously, it has flaws. But, so does capitalism.

And, in my perspective, I think the flaws found in market socialism are both not as bad as the flaws in capitalism, and would be more attuned with self-correction, simply because the flaws of market socialism will be discussed and ironed out in democratic discussion. Whereas, capitalism's flaws tend to become systemic problems that aren't addressed, because doing so threatens the main motivator of capitalism: profit generation.