Gridlock/separation of powers has its upsides but it also has a big downside: lack of agency can mean lack of responsibility. "Oh sorry I can't do anything to f

Gridlock/separation of powers has its upsides but it also has a big downside: lack of agency can mean lack of responsibility. "Oh sorry I can't do anything to fix this mess unless Congress acts" "well we in Congress passed a law but the administration is refusing to implement it properly" "it's the fault of the states" "blame the Feds" "the Supreme Court has tied our hands" etc. In an autocracy, the autocrat ideally has nobody to foist blame onto. (In practice they often blame imaginary bogeymen or minority groups)