Why does the federal government offer subsidies to increase enrollment in post-secondary education? All of the answers listed are correct. Because there are positive externalities from education. More education tends to make a person a more productive worker. To move the equilibrium quantity closer to the social equilibrium, which helps to solve the market failure in education. Why does the federal government offer subsidies to increase enrollment in post-secondary education? All of the answers listed are correct. Because there are positive externalities from education. More education tends to make a person a more productive worker. To move the equilibrium quantity closer to the social equilibrium, which helps to solve the market failure in education