Originally Posted by no_clue
OP please don't compare tournaments and sit n go's as if they are the same. Moshman is discussing sit n go play (single table i'm assuming) where playing to cash is correct as far as passing up +cEV edges that are not +$EV. They are not the same.
They are not the same, but similar aspects of chip equity vs. prize pool equity still apply. Given normal prize pool distribution, it is never correct to play only to win or only to cash when maximizing expected value in both single table SNG and MTT. How much you need adjust to maximize prize pool equity instead of chip equity depends on the prize pool distribution, and is situation dependant, as stated by Bizarro Gonzo.
Of course, the ultimately correct thing maximize is the utility. As prize pool equity is a function of chip equities and prize pool distribution, utility is a function of prize pool equity and individual utility "distribution", so folding your way to cash might be correct in some situations even if playing aggressively would have bigger expected value.