Canute tried to hold back the waves and you're like Canute with respect to finance. Financial engineering cannot be uninvented. If you want to stop the plutocracy game, inversely index taxes to the Gini coefficient measure of inequality: https://medium.com/the-national-discussion/how-to-stop-the-plutocracy-game-index-the-top-1-s-tax-rates-to-decreasing-inequality-a3a19f42cd97

If currencies are convertible between nations that trade with each other, which is essential if you wish to freely travel, people will trade them and their derivatives (options and futures). The Greek mathematician Thales, who measured the height of the pyramids, invented the first futures (on olive presses).

Stock markets allow business founders to exit and diversify their assets. There are also secondary markets for startups like Seedrs, Equityzen and Secondmarket. The Nasdaq has one for startups to IPO.

We invested in a Latvian startup in 2017 when nobody else would. That's why we got a super low valuation. For four years we helped the founders as advisors, fundraisers, while my lawyer partners gave tons of free legal advice and saved the business a fortune in legal fees. In the last funding round it was 30% of a unicorn ($1bn valuation). The founders would never agree that we, as investors, were parasites who did no work and took no risk.

I have lots of financial scars and hundreds of hours of wasted effort to prove that investing involves lots of messy work that often comes to naught.

Is the financial market casino underegulated? Absolutely? The problem is figuring out how to channel its participants' greed into socially constructive ends with wealth taxes, higher taxes on short term profits, a Tobin tax on derivates and forex trading and with lower tax rates on productive long term investment. Like other humans, the investor class responds to incentives and just wants to have clear and consistent rules that are the same for everybody. The big problem is that most of the politicians who legislate the rules are financial and mathematical illiterates who have no idea how the system really works and often sabotage expert regulators who do, giving those experts an added incentive to go through the revolving door to work for the institutions they regulate. And broad brush accusations of parasitism against those who actually work as investors gets nothing done and just alienates those who would actually like to see a better regulated system that lowers our sky high Gini coefficient (.48 now vs .36 in 1967). If you don't know what these numbers mean, you need to read some more before writing again about finance and economics.