The trouble with "trickle down" economics is that in the 40 years since its invention nothing has trickled down. While we wait for the trickle to start the rich just keep getting richer because there are no limits to their bank accounts, salaries, investment earnings, etc. As Pope Francis recently pointed out, the only way anything will trickle down is if the container holding it fills to overflowing.
The tax code needs to be revised so that there is a great incentive to reinvest capital in businesses and not hoard it. Sooner or later, when all the stock available has been bought back and all the capital improvements to the business have been made then some of the profits will surely end up in pockets of the workers. This money which will have trickled down will go immediately back into circulation, excecutives will buy second homes, managers will send their kids to college and hopefully, some of the workers will be able to get off welfare and food stamps.