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Amazon is blocking promotions of employees who don't comply with its return-to-office policy, leaked documents show
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
The laws are pretty different for contract workers vs W2 employees. W2 employees can have contracts, but it's really rare outside of unions. Conditions of employment can in most cases be changed at the employers discretion.
I feel a little bit like I'm defending Amazon here, but I'm really trying to highlight that our worker protections are crap in the US. Unions are really the way to go if employees want security. Tech industry has way too few unions.