Most really wealthy people either got wealthy through one idea, company, or just plain inherited wealth. None of these options make them good investors, especially investing to improve the economy.
We need to remove the obstacles created by the many concepts similar to Reaganomics to retain capitalism as the basis of our economics.
Only two "trickle-down" methods work. One is your children who waste money and the other is government taxes. Whereas children are rarely as talented as their parents, taxes enable a consumer based economy which enables people to buy new products from new entrepreneurs.