Engineers get hammered on equity by Founders, who get hammered by Venture Capitalists, who hand over most of their profits to Institutional funds. It's a food chain thing, but I don't think it's worth getting that upset about.
But then again, Institutional Funds put billions at risk to into Venture Capital funds who put millions at risk to founders who take on more risk, and a boat loat more stress and hassle (usually) than their employees.
Software salespeople need to bring in 4-5x of what they cost. Lawyers and consultants are often tasked with bringing in 3-4x their cost. Why should engineers be any different?
My granddad told me a story a few years ago about a guy who was a fantastically successful oil trader. A buy the whole tanker oil trader kinda guy. One of the reasons he'd been so successful was that he always tried to leave a bit of margin there for other people.
I work as a recruiter. I know exactly how much money I've made my company and how much I've personally been paid. I could make more by starting out on my own. But I'd also take on a lot of hassle that I don't really want to bother with at this point in my life. As long as it remains a fairly reasonable trade, I'll be fine with it.