Afaik he still has retained a position of considerable power:

Long-time Amazon executive Andy Jassy will be the new CEO, but Bezos will be the company’s executive chairman — corporatespeak for board leaders who, unlike most, stay involved in key operational decisions.

For all we know, they could be about to go all in on Pinkertons and Blackwater types to shut down the unionization movement, and he wants to pin it on this Jassy person, that's my guess