It doesn't have to. If prices are constant and computers halve in size/power use every x months, real estate prices per bogomips halve every x months, too.

"Do the programmers, system admins, and other techies' salaries paid by amazon follow Moore's Law?"

Again, they don't have to. It also is possible to make efficiency gains. Here, I would guess Amazon has outsprinted Moore's law.

Similarly, I would guess network costs and speed have gone down faster than Moore's law.

Of the things you mention, my _guess_ would be that only energy prices are a significant factor stopping AWS pricing from following Moore's law.

But yes, it is more complicated than "pricing should follow Moore's law"