If you haven't heard of the play Hamilton, welcome from outside your rock :P. In the plan, the second act is largely based around Hamilton trying to get his plan to assume state debts through. I was wondering how important this plan really was. Thanks :)
This would be a very long and complicated answer (which I can certainly do at a latter date if you'd like), but basically Hamilton's financial policies shaped the US economic system and much of the government's internal system forever. Perhaps his largest contribution was the assumption of state debts to the national government (the same plan that's talked about within the musical itself). After passing the assumption policy (and trading the US capital away) the government controlled the taxing policies, rather than the states - a very important change which of course still affects us today. This among many other actions that Hamilton took greatly increased the power of the executive branch.
Rob Chernow's biography is well worth the read if you're a fan of the musical as I am.