You presume that reducing the number of scenarios by which a founder will become wealthy somehow motivates the founders more.
You say business should be shut down if they don't fit in the model you describe.
This is a very narrow view. Its also a very polarized view-- it seems to be the perspective that either you're trying to be the next youtube or you're opening a farm.
There really is quite a spectrum between them... and far more high tech successes are not youtube type situations. That's an extreme rarity.
You're locked into a mentality that causes you to repeat this perspective, and you don't seem to be responding to what I'm saying, and I just don't see things that way.
So, I don't see much point in continuing this thread.
Good luck if you decide to start a company!
In most startups the proposition is metaphorically identical: succeed before money runs out or die. The kind of intense pressure that exists in all of the competitive startups I've seen. It's a marathon race, not a stroll through the park.
The founders motivation is ownership and the potential payout that ownership provides. If you take so much investment that you can't sell your company for enough to profit from it then you may as well close up shop (which happens frequently).