The term "trickle-down" has been poisoned. There is nothing bad about it. "Trickle-down" isn't really a government strategy or whatever, it's just the basic building block of a market-based economy.
I have money, but I need some meat to feed my family. So I visit my farmer, who raises several hundred head of cattle. I trade some of my money for a side of beef. Now in theory, that money I gave him is more than it cost the farmer to bring that cow to market. So with that "profit", he is able to buy feed, for example. Perhaps that feed might come from an adjacent farmer, who again brings that feed to market for more than it cost him to produce it. He take his profit and buys seed for the next year. And so on and so on.
That is "trickle-down" economics that I've just described. But it's the way it's been done for millennia. Long ago, it might have been wampum traded for animal pelts based on a voluntary, mutually-beneficial transaction.
"Trickle-down" is just another in a long line of ideas that has been turned into a pejorative by people who don't understand it.
If a CEO shouldn't be paid based on the profits he generates, what then should be the basis for his compensation? Just because a CEO is paid an "astronomical sum" doesn't mean there's no money left for expanding the workforce. Furthermore, businesses don't just expand their workforce on a whim. They expand when there is more demand for their product(s) than the current workforce will be able to accommodate.