Imagine you repeal all accredited investment regs overnight. Which of these seems likely:
- everyone in america invests $1000 in a future facebook, ten years later we're a nation of millionaires.
- 10% of the middle class (a huge number of people) wholly or partially cashes out retirement funds to put too much money into speculative early stage startups chasing fantastic returns. They lose it. Kids lose college funds, adults lose retirement funds, and we / society / government has to pick up the tab when such people get too old to work.
The point is, it's easy to attack these regulations as a barrier to opportunity and an unfair impediment to your right to do whatever you want with your own money. That's fair as far as it goes, but you also have to grapple with the real consequences of changing the policy. I have a hard time with your analysis that accredited investment rules have no "public good."
Phrased differently,the view on the ground in middle America is this: lots of middle-class people buy lottery tickets. Why do you suppose they do that?