I think most reasonable people believe that a strong middle class is important to a well functioning society. However, I am not really sure what @Jon Q. original post was trying to accomplish and find items 2 and 3 particularly odd.
I should start by clarifying that the average annual return of the S&P 500 over the past 50 years is around 9% and the first ETF to hit the market SPY has returned 397% since its inception in 1993. The fees for this ETF are .08% which is pretty standard for all ETFs.
Investing a large portion of you assets in one investment whether it be a real estate deal or a company can produce a much higher reward but comes with a much higher risk. The chances of the S&P 500 dropping to 0 is almost non existent while real estate developments go bankrupt everyday.
My second clarification is that the SEC does not regulate private investment AT ALL. The accredited investor rule applies only to non registered securities. The SEC defines a security as a contract in which an investor expects a return based solely on the efforts of a third party. Anyone of any income level can invest in any business or property of their choosing as long as they play an active role in that investment.
There is substantial risk of fraud when an investor relies solely on the unregulated statements of an unrelated third party. People of all income levels are susceptible to the fraud. Someone with millions of dollars in the bank can sustain a total loss on one investment without it materially changing their life for the worst. Someone without additional resources can be financially devastated by that same loss negatively effecting their entire family.
Globalization and technological advances have had a terrible impact on our middle class and restoring the middle class should be high on everyone's list of priorities. However, this restoration is going to come from job training programs and access to higher education and not from encouraging people to risk their life savings on high risk unregulated investments. Increasing the capital gains tax and using that money to help fund these programs and lower taxes on the middle class is something I support and can agree with Jon on.