Adam says to Karl, "I'll trade you two steaks for 10 pounds of potatoes."
Karl replies, "I'll take two pounds of steak in exchange for two pounds of potatoes because that is fair."
Adam says, "I don't think so. It's not worth it to me."
Karl slots a clip into his AK-47 with a clack and says, "Think again."
Under capitalism, we trade voluntarily. Nobody pulls a gun. Everyone has the right to withhold from everyone else if they do not think they're getting a fair deal.
Under socialism, trade is structured according to someone's conception of what is fair? Who decides what is fair? The guys with guns decides what is fair.
We now have a bill passed by our representatives that proclaims that it is fair that everyone should be forced to buy health insurance if they can afford it. Suppose you do not want to buy it?
You can be sentenced to five years in prison.
Enforced by guys with guns.