If working 40+ hours at Tesla makes you into a millionaire in the same way using other people's money to start a company does, then I will stand corrected.
Elon is a smart man, many of these executives are smart people, they know working for a company does not pay off in the same way that entrepreneurship does. They admit as much when they describe why they deserve so much money.
I'm not even saying employees should expect that type of return, what I'm saying is that executives should not use their hard work to become massively wealthy to try and influence their employees to work just as hard, when they know the payout is not there. It's manipulative.
Everyone knows Musk "slept on the factory floor" to get Tesla working. That type of investment has paid out well for him. It won't pay out well for the workers on the factory floor.