For the limits in the Constitution to be meaningful, there must be a branch of the government which serves as the final and authoritative interpreter of the Constitution for all parts of the government. According to Hamilton's argument, what about the legislative branch in that role?
It would be effective in maintaining the separation of powers because Congress can use the power of the purse to enforce its interpretation of the limits in the Constitution.
It is a good idea because, unlike the executive, Congress does not control the force of society.
It would create a serious violation of the separation of powers.
It is a bad idea because Congress can decide who is commander in chief of the military.