[S]ome companies have scarcity power and can set prices that are far above their true cost, which is where they would be in a competitive market. This is why economists believe there’s an important difference between being in favour of markets and being in favour of business, especially particular businesses. A politician who is in favour of markets believes in the importance of competition and wants to prevent businesses from getting too much scarcity power. A politician who’s too influenced by corporate lobbyists will do exactly the opposite.

Tim Harford, The Undercover Economist, London, 2006, p. 78