I don't think George III had nearly as much power. He had a very contentious parliament to deal with.
Excellent point. Yes, and no. George did have a rough time with Parliament, and that's one reason he asked Lord North to be PM, because he knew he was an excellent parliamentary tactician and would be tough (ruthless, even). But George would also just do end runs around them. For example, when he and North first became aware of the aliance between the Americans and the french, they witheld that information from Parliament. George was afraid they'd insist on war with France and really ruin his day.
If we don't rein them in soon, this country will either have a Lexington and Concord/Fort Sumter moment (bad) or we will be too whipped to have a Lexington and Concord/Fort Sumter moment (horrible).