Who was particularly opposed to this Hamilton financial plan and why

One of the key figures who were opposed to Alexander Hamilton's financial plan was Thomas Jefferson.

Jefferson, who served as the Secretary of State in George Washington's cabinet, deeply disagreed with Hamilton's vision for the country's economic future. He believed that Hamilton's plan favored the interests of wealthy individuals and speculators, rather than the common people.

Jefferson argued that Hamilton's proposal to assume state debts would benefit the northern states while burdening the southern states, who had already paid off a significant portion of their debts. He also opposed Hamilton's establishment of a national bank, which he believed would consolidate power in the hands of the federal government and elite elites.

Furthermore, Jefferson was wary of the influence of financial institutions, fearing that they would corrupt and control the government. He believed in a strict interpretation of the Constitution, which meant that he saw no provision for the creation of a national bank or assumption of state debts.

Overall, Jefferson's opposition to Hamilton's financial plan stemmed from his beliefs in state's rights, agrarianism, and a more decentralized form of government.