The bottom line is the USA is now officially a plutocracy, and no longer a democracy.
Citizens United was really just the final stake in the heart for democracy in America.
How will this realistically work in America? We are too big to be a Monaco, and not unified enough in one religion to be a Vatican City.
Singapore? Hmmm, I don't know? Perhaps, but again, I think the US is too big and diverse to be this form of city-state plutocracy.
Gosh, I don't know why, but with this post it has FINALLY sunk in that the USA is no longer a democracy. God, its really sad.