trickle down economics is pure bullcrap. I worked for a very large bank once upon the time. Private Bank division, you had to have 20mln before we spoke to you. Think of a billionaire, they were likely our client.
During management pow-wow once i had a chance to meet our sales folk, ones who dined and charmed them geniuses, i figured it was a great time to find out how the "rich invest their money ...." theory works in practice. I asked "what is our client expectation ? Return on investment or capital preservation?". Answer: 95%+ is captial preservation. Match the inflation, minimize the risk.
So much for trickle down sillyness.