Arnold Kling cites this interesting suggestion from Michael Strong's book Be The Solution: The very fact that we have moral impulses to support the public good is necessarily intertwined with the fact that we have moral impulses to punish those who do not (and to punish those who do not punish those who do not, and so on) … This instinct is especially harmful when used to punish those who are perceived not punishing free riders. This is the source of the bigotry against market economics among the do-gooders: It is believed that those who describe the positive outcomes of free enterprise are not doing their job to behave punitively toward free riders, and that therefore they, too, must be punished.