There is a tought experiment propsed titled Politicians and Shopping Carts:
Imagine buying groceries in the same way that voters make political choices — that is, you would choose among large bundles of grocery items just as, in politics, you choose among candidates who are each large bundles of positions on countless issues.
You’d walk into a grocery store, on schedule, once every week or month or whatever spacing of time is mandated by the Shopping Constitution. Upon entering the store, you’d see before you only two or three shopping carts, each pre-filled with a selection of groceries. We can suppose that each cart is covered with clear, distortion-free plexiglass, allowing you to review each cart’s contents before choosing.
The answer is simple: I would choose the cart which would best let me trade with other people to get the items that I wanted. In other words, I would use it to barter what I want. You can’t take the free market out of man, because it is in our nature.