Every thing comes down to risk vs reward. Founders risk it all to found companies and rightfully have the greatest reward. Startup employees haven't risked as much but their risk is compensated with appropriate equity the earlier they join and the more risk they take on in the form of lower salary and benefits. YC definitively reduces risk and increases the potential for reward. It's easier for YC companies to raise…
I've learned that founders have a much greater risk/reward ratio than employees. The ratio is really not even close. The assumption that founders risk it "all" is a fallacy. The assumption that employees have less risk is also inaccurate. It depends on the situation, sure -- but I know plenty of startups founded by people who can crash and burn and not have their livelihood affected.
As for "risk compensated with appropriate equity", I'd have to say that most early-stage employees get screwed. The only case where early-stage pans out with commensurate reward at the employee level is when a company goes public. Given that most successful exits nowadays are through acquisition, most early employees are simply hosed.