I'm just not sure why you think junior level employee #20 deserves more than what he agreed to when he got hired. Clearly he was making a full salary, probably with benefits, that compensated him for his work. He took no risk whatsoever.
I'm sure if junior level employee #20 said, "I'll work for half price if you include a bit more equity" there would be a lot of companies that would accept. However clearly he didn't want to take that risk at the time, so why should he get the reward?
I'm sure if junior level employee #20 said, "I'll work for half price if you include a bit more equity" there would be a lot of companies that would accept. However clearly he didn't want to take that risk at the time, so why should he get the reward?