Monopolies die after a bit unless governments save them. Monopolies tend to stagnate, become too bureaucratic, and lose the pressure to perform. They then lose to more dynamic competitors. Sears is an example of loss, the banking cartel is example of government interference.

Laws, otoh, are not magic. Making a law doesn’t solve the problem. Laws require people with guns to go enforce them. The government has no incentive to use force against the people lining their pockets, and so laws tend to be enforced primarily on the poor and the working class. Only when the majority of the votes of the public could be swayed will government attack the donor class.