Using money to influence—ie. purchase—elections began when Thug gave Ugg a big, sharp rock in return for his vote for cave leader. It’s an ugly scene – and it has never stopped.
But with the advent of formalized democracy, purchasing a vote has gone through a psychological shift. With money, you can buy a voter’s neurons, board the brain like a pirate, and steal the booty—some poor schmuck’s “choice” made in a voting booth.