No person can produce a product or a service on the free market by forcibly taking money from other people. And they will do that only if the product is better or cheaper than the competition offers. The president of General Motors is an influential man, but he has no power to arrest you if you don't buy his products, or to try you or fine you or jail you if you refuse. He offers you a product at a price, and if you don't want to pay the price you can turn to someone else. At least that's the way things are in a free competitive society.
Competition keeps the price down, and keeps the producers always on their toes.
It's all very different with government, of course. There is no competition to keep the price down, for the government creates a monopoly. The government operated Post Office Department won't permit anyone else to handle first-class mail. If it did, the Post Office Department would be out of business in a week. It can maintain its status only by being a monopoly.