Unfortunately, central banks don't have much leeway in choosing where the money goes. Government budgets can distribute money to people through welfare, jobs programs or infrastructure investment. By creating a low interest rate, the central banks are essentially begging governments to take the free money and use it to stimulate the economy. Austerity proponents, deficit hawks and outright political deadlock is making this fail. Basically, "You can lead a horse to water, but can't make it drink."
