"If Men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government would be necessary. In framing a government which is to be administered by men over men, the great difficulty lies in this: you must first enable the government to control the governed; and the next place, oblige it to control itself."
James Madison, "Federalist No. 51)

Madison explained carefully why he advocated for three separate, equal, fully operating branches of government. The current coup by neglect (see: Republican Party in Congress) would, in his Enlightenment mind, provide justifiable cause for rebellion. In fact, allegations of royal overreach and trampling on parliamentary prerogatives did arise as a rationale for rebellion in the 1770s.