There is no ethical justification for states to tax internet sales other than "because we think we can".
If they want to fix the problem of "fairness" for Main Street then the solution is simple; abolish the traditional sales tax.
The states are broke. But they will limp along until the Feds cut off the life support. I cannot imagine what a 50-75% instant drop in their revenues will do to them.
Oh, wait yes I can. I think I'll throw a party!
The states figure that this is money they are entitled to, that we have been shortchanging them. Let the little people cut back their spending so that the largesse of the state can continue.
masses work, pay taxes, fund gov't. At this rate, eventually, everyone will work to subsist & pay the gov't. It's like any other business, although with pretty much ultimate power, attempting to save a dying business model. On the other hand, most successful operators would've cut costs, streamlined and reduced debt levels to manageable levels.