If your parents are paying for your higher education, they have a say in which university you go to.
When an investor puts money in your startup, they seek percentage ownership in your firm.
When you take a mortgage, the bank owns a large percentage of your home. Education loans control your lifestyle and career choices.
The client who pays the bill decides the way the project is done.
One who pays the money gets to control the game.
It’s generally true except in case of government taxes where the common man hardly has any control.
It’s the reason companies align themselves to the interests of their highest-paying customers and the governments get to decide the way distribute social benefits (and for how long).