This is... Not the best? That Wal-Mart is powerful enough to dictate the internal business practice and tech decisions of it's vendor. On the other hand, Amazon is a massive immoral monster devouring the US economy and replacing it with something vaguely worse, year by year. It's rapidly approaching a "too big to be allowed to fail" status, and that's awful for Americans. Since anti-trust laws weren't written by a ge…
Can you expand a bit on your suggestion that Amazon is approaching a "too big to be allowed to fail" status? Are you speaking specifically about AWS?
But secondary effects of lost sales from vendors would almost certainly upend the vendor table and make goods very difficult to get ahold of. Amazon as a delivery service (and its smile boxes, ads for its own products on said boxes, and specialized delivery frameworks) is as much of an American institution as the post office now, and growing as it takes over its own delivery and logistics.