Very disturbing opinion. Effectively, so long as the government is using money (in the form of taxes or spending) as its weapon, there are no limitations on its power. It can use money even to accomplish unconstitutional means. (Keep in mind the Court did hold that the mandate is unconstitutional under the commerce clause.)
Another question that should be raise is at what point does a tax effectively become coercion? From the Court's opinion, it's clear that the constitutional implications of its goal are irrelevant. Suppose the GOP wins next year and decides it's going to impose a $5 million federal tax on abortion. They aren't banning abortion. They're just imposing a tax on those who choose to have one. Under this opinion, what would be wrong with that? Can Congress ban abortion? Of course not, but according to the Chief Justice, it can't mandate that you buy health insurance either, so really, it doesn't matter what Congress has the right to do, so long as we're calling the financial imposition a "tax."
(And by the way, we can tell the public we're not levying a tax and even avoid calling it a tax in in the legislation to protect ourselves from the political implications of raising taxes, and we can walk into Court and for the first time argue that the imposition is a tax, despite all our public statements and the actual language in the statute that says the exact opposite.)
Frankly, the decision should scare you a little bit no matter where your leanings are.