Not can, actively is. If you as as manager know that you have to fire x% of your employees no matter how good they are as a whole, you are always going to hire certain people just so you can fire them in order to protect your most valued people.

Also, because each hire costs thousands of dollars, the company is literally wasting millions each year because Bezos had this dangerously ignorant and dehumanizing idea that people - except himself of course - are lazy so they need to be terrorized into being productive by firing a certain percentage of the employees.

Ultimately, it damages not just Amazon's brand as a employer, it reflects poorly on Amazon employees and managers for going along with this charade.