Pray tell, where does the Federal Government get the authority to enable the States to collect taxes from businesses and suppliers located in other states?
I'd like the citation. Be specific.
That’s the commerce clause. It’s one of the few things that the federal government is really given the power to do, set up rules by which trade between the states will be conducted.
In this case, the federal government is debating whether to require, as part of doing a trade over a state line, that a company wishing to do so commit to collecting the sales tax for that state.
Whether you think that is a good idea or not, there is no constitutional problem with the federal government creating such a system.
IF they do so, each company can still choose whether to perform this service, by choosing whether to sell their goods and/or services to people within a state.