If the government and Central Bank don't use economic policy, what could happen?

This would leave the economy in the laizzes fairie position and it will cause malpractices.

Explanation:

Laizzes fairie is the concept that the market should be left on its own without any government influence or meddling with he rules and let the market rules define themselves.

This is not a good strategy as the malpractices of the market will take over and this makes the poor disadvantaged as they are wont to be taken advantage of by those who own the means of production in the state.

This is why the government's policies are needed as well as the Central bank.