[andsoitis]

> Employment relationships and tradeoffs are negotiated at the time of hiring. Abruptly changing the terms in the middle with no re-negotiation is unfair.

Concur that the employer has to behave within the confines of the contract. If not, that's a contract violation and they should pay dearly. Is it the case that they are violating contractual terms? Or are they operating within the flexibility offered by the contract signed by both parties?

[unpwn]

Whether they have violated the contract, like all of law is up to interpretation; Most likely, given Amazon's large team of lawyers, I'm sure they could get away with almost anything.