If we have system in which government is in a position to give large favor - it's human nature to try to get this favor - whether those people are large enterprises, or whether they're small businesses like farmers, or whether they're representatives of any other special group. The only way to prevent that is to force them to engage in competition one with the other.
There's only one thing that all of the central banks control and that is the base, their own liability, and they can control that in various ways. They can control it directly by open market operations, buying and selling government securities or other assets, for example, buying and selling gold, or they can control it indirectly by altering the rate at which banks lend to one another.
People hired by government know who is their benefactor. People who lose their jobs or fail to get them because of the government program do not know that that is the source of their problem. The good effects are visible. The bad effects are invisible. The good effects generate votes. The bad effects generate discontent, which is as likely to be directed at private business as at the government.
If, for example, existing government intervention is minor, we shall attach a smaller weight to the negative effect of additional government intervention. This is an important reason why many earlier liberals, like Henry Simons, writing at a time when government was small by today's standards, were willing to have government undertake activities that today's liberals would not accept now that government has become so overgrown.
Economists may not know much. But we know one thing very well: how to produce surpluses and shortages. Do you want a surplus? Have the government legislate a minimum price that is above the price that would otherwise prevail. That is what we have done at one time or another to produce surpluses of wheat, of sugar, of butter, of many other commodities. Do you want a shortage? Have the government legislate a maximum price that is below the price that would otherwise prevail.