Like any member planet, Earth would have to have a planetary government for pretty obvious reasons -- there are simply planetary affairs which need to be handled which have absolutely nothing to do with the Federation.
If the Earth planetary government was to be supplanted because Earth joined the Federation, I'd be the first one in line to sign up for Terra Prime. I don't want to be told how to live my life because of the way a bunch of people from other planets voted in San Francisco.
I doubt the people of Earth would allow themselves to be subject to Federation law without their own planetary government in place any more than Texas would disband its state government and submit only to Federal jurisdiction.
If the Earth planetary government was to be supplanted because Earth joined the Federation, I'd be the first one in line to sign up for Terra Prime. I don't want to be told how to live my life because of the way a bunch of people from other planets voted in San Francisco.
I doubt the people of Earth would allow themselves to be subject to Federation law without their own planetary government in place any more than Texas would disband its state government and submit only to Federal jurisdiction.