Why did James K. Polk cut taxes?

James K. Polk cut taxes primarily to promote economic growth and reduce the national debt. His administration believed that lowering tariffs would stimulate trade and increase revenue through higher economic activity, rather than relying on high tariffs. Additionally, Polk aimed to streamline government operations and reduce expenditures, aligning with his broader goals of territorial expansion and manifest destiny. These fiscal policies were part of his commitment to a limited government and economic efficiency.