Only as long as their employees will take the abuse. I stopped buying from Amazon years ago because of how they treat their people. Never looked back, and my quality of life didn't even go down.
Discussion
I was never in denial about that. I've heard the nightmare stories. I was speaking from a strictly objective viewpoint. And Amazon has been quite brilliant with the implementation of their business model.
1. Top-notch customer service
2. An extraordinarily broad array of services
3. Well-placed warehouses over a global region
4. Near perfect trade and delivery routes
5. Many employees
Like I said: 'no empire lasts forever'
Even Bezos said this in a past interview.