Trickle down seemed to work pretty well when our union membership was higher, and that's still true today in societies that have higher union membership, or higher employee ownership. "Seizing up" economics works.
Most public state pension funds base their funding on returns of 7-8% a year This has long term effects on state funding of pension obligations
If costs go up, a company fires workers and cuts salary benefits to preserve its bottom line. If a company sees a surge in revenue/incomes, they often focus on their bigger profit margins, not sharing it with all the workers. If a company gets a large tax break it often rewards itself. Why would an economic theory work if it is based on rich people taking their extra wealth and suddenly sharing it with all the poor people below them?
trickle down = supply side economics When the supply side gets upset its much more serious then a weak demand side Example now is the chip market