Does Amazon make no money from AWS and their other ventures, like the Kindle? It seems hard to believe that possible tax reformations could kill such a huge company.
The way he's throwing the numbers around, he almost seems to be implying that Apple would have to pay the 6% sales tax out of pocket, thus reducing their 3% profit to a -3% loss.
Even if Amazon collected sales tax, their base prices are often cheaper than the local prices here, so I'd still order from them.