What economic problem did the young nation face and how did Alexander Hamilton propose to solve it

Alexander Hamilton was elected by George Wasington as Treasury secretary, his goal was to improve the solvency of the new nation, which was not very good because both the states and Congress were indebted for the war of the revolution.

To solve the situation, Hamilton suggested that the federal government assume the debt of the states for which he founded the first central bank in the United States with the ability to mint money.