[maym86]

This would be bargained between management and the union and is not automatic. Maybe it's a threat but not necessarily an issue Amazon would face even with the formation of a union if this is something Amazon really wanted to keep out of a contract.

At the end of the day both the company and the workers/union have to agree on the terms and people may not be willing to strike over this single issue if the rest of the deal was good.

There are plenty of other reasons for Amazon to want to prevent a union from forming including increased pay, benefits and time off but a union's ability to prevent automation may not be huge issue as Amazon is still growing and hiring workers faster than the jobs are being automated.