I'm currently working on founding a search engine that is in direct opposition of Google's values, or potentially lack thereof, so I think that might be a hard sell for them ;)
And the numbers don't really work out for founders for the first couple years in terms of any salary so I think again we view money differently. I'm not really disputing that your numbers work for being an employee but they don't really hold out for people working to start their own thing, at least in the short term. As I'm sure the OP is aware there's intangible benefits that don't take the form of a retirement account associated with running your own thing.
Edit: I'll also say we may be at a point where we're starting to talk passed each other, your math checks out for sure I just don't value the benefits associated as much.