It would make checks and balances obsolete; one branch (lets take legislative) would be able to do whatever it sees fit without the other two branches balancing out the power. if most of the power shifted to one then the other two cant stop its decisions.
Answer:
Great Britain was taxing America heavily because they needed money, but Americans weren't happy because they didn't have money either. So when Britain wanted to tax them, they revolted.
West Indies and focus particularly on the atrocities committed by the colonizers against the indigenous peoples. So he just felt the need to do it.
