I'll note that nothing is actually stopping you from saying "sorry, no I don't want to work at your startup but would you take a 100k investment instead?" & becoming an investor yourself. You get to choose which role you want to play so why is "but I put time equity into it & didn't get rewarded the same" a fairness axis? You have access to all the information at your fingertips. To me if you're unhappy with a particular outcome that depends on which side of the equation you were on, that has to do with your own decision making ability/negotiating ability.