There has been nothing more stressful for me than having this scenario happen - I just can't stand by and watch my efforts go to waste. (The Big company context for me was in the Architecture world, but you can substitute any profession you like in the above scenario) The best stress-reduction decision I have ever made was to start my own company. It was very difficult financially at first, but it was completely worth it.
Money, freedom? I say risk.
There is less risk working in someone else`s company. If you take no risk then you will not have the potential to make more than in a startup. You also kiss your freedom away. Freedom. Thats a joke. For all those working for a company, tell me you really have the freedom to work, do what you want, when you want?
So if you want no risk, look forward to structured environments, other people telling you what to do and limit your ability to earn. Go work for the googles of the world [0].
Reference
[0] knowledge @ wharton, University of Pennsylvania, 'Perk Place: The Benefits Offered by Google and Others May Be Grand, but They're All Business'
The point is that at a startup (especially the two guys and a laptop variety) you do absolutely everything yourself, while at a big company you are supported by IT, QA, custodial services, etc, etc.
The interesting question is whether there exist jobs for which that support is worth the money and freedom one gives up working at the large company.