The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
All those powers were lump summed down to the States and the people of those States. It was up to them to come up with their own Constitutions for their State governments. The People could make their State Constitution mandate that everyone wear BLUE colored clothing only for State business. but it would still need to be an enumerated power to the State. Otherwise, you would be giving nearly unlimited power to your State government. Surely you are stupid enough to think that the Founders would approve of such a system.
Are=aren't. Damn fingers...
"Otherwise, you would be giving nearly unlimited power to your State government. Surely you are stupid enough to think that the Founders would approve of such a system"
"surely you are stupid enough"? Or did you mean to say "surely you aren't stupid enough"?
It wouldn't be practical to expect that every specific power be listed in a State constitution before the legislature is allowed to exercise it. The legitimacy of the power comes from the more general language of the Constitution, which insures things such as the people who make laws are affected by people who have to live with them.
Checks and balances and representation prevent the absurdities you're citing as examples of what could happen - Not specific authorizing language.