I think it’s fair enough to put in some really intense years with the promise of a nice payoff and ability to retire early, as opposed to spreading that effort and payout over decades with work / life balance. The problem is when that same intense effort is asked of anyone who will not be getting such a payout at the end. Even workers with equity in a start-up can get the shaft due to the fine print where the VCs take the lions share of the exit money and the workers end up with a paltry sum to that won’t even cover their medical bills later on after the stress takes its toll on their bodies.