For those who understand that American history continues past 1803, yes, the bill is constitutional.
In fact stupid, even Roberts ruled that the government does NOT have the authority to force individuals to purchase a product from a private company - i.e. the mandate. He followed by saying that taxation of an individual, with those taxes used to purchase the same product, is constitutional.
The sticking point has long been whether a government can compel the purchase of products from favored corporations. Roberts ruled that they can NOT do so. But then provided means to achieve the same ends using government as broker. Even a Stalinist like you should be able to grasp the nuance.
So at this moment, Obama cannot command you to buy a pack of Kools, but he can have the IRS shake you down for $5, buy the Kools and then give them to you. (Mandating you buy his brand isn't for a kickback, mind you...)