Does Trickle-Down Economics really work?

Trickle-Down Economics
Trickle-Down Economics theory states that tax cuts can help successful people in the society like businessmen, investors, etc. to increase the economy of the nation. The extra cash they earn will be invested to expand companies which will create jobs for the workers. The workers will spend their salary, leading to a demand, thus resulting in the economic growth. In theory, it sounds great, but does...