I'd be curious as to how much the executives at these firms earn (whether it be through salary or equity or whatever else).

In most cases, same as an L6/7/8 SWE at Google MTV but at the upper rungs closer to L8/9/10 EM ar Google MTV. Use levels.fyi to look at the numbers.

Heck, I earn less as a VC today than if I remained a SWE or PM in my niche but with more stress and worse working hours.

Edit: Why the downvotes? Do y'all actually even know PE/VC and leadership salary scales?!?