The necessary and proper clause (Article 1 Section 8 of the United States Constitution) states that Congress has implied powers. Implied powers indicates that just because the right/responsibility is not given directly to Congress in the constitution, it does not mean they can't do it.
For example, the first Supreme Court case that brought this up was McCullough vs. Maryland. In this case, it was decided that Congress has implied powers, including the power to creation a national bank.