I think equity compensation is also a selection mechanism. If I'm running an early stage startup, I want everyone to have a stake in the game. Equity compensation attracts employees with that mindset. Conversely, if a potential employee would prefer all cash compensation to equity, that would be a big red flag to me.
One of the struggles of offering equity to employees is finding a mechanism that has no taxable value upon issue, benefits from capital gains, and is legally sound.
One option is to organize as an LLC and offer a profits interest. These can be issued with $0 taxable value and benefit from the upside of the company. They can vest, and once vested they can participate in the gains of the company (including distributed income, not just a sale). I believe these are inherently more fair to the employees because there is no golden handcuff. They don't need to be exercised and once they're vested, you can walk away with them. On the downside, they are a little more cumbersome to set up.