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Amazon is making its employees come back to the office five days a week
(www.theverge.com)
This is a most excellent place for technology news and articles.
There should be protections against hiring someone remote and then forcing them into the office as soon as you want to lay people off by forcing them to quit so you don't have to compensate them.
In some countries, there are already.
In others, it will be up to courts to decide whether this is illegally firing staff. That said, good luck getting equal legal representation to these trillion-dollar companies.
So yes, basically, it's legal.