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Most likely this is a category of 401k (or IRA) called a SEP IRA. It works to the company’s tax advantage and they have the ability to force it on all employees. All employees is a requirement of this. I don’t have a ton of knowledge about this, but about a decade ago I dug in to it because my wife’s company did this to us at a time we really needed more flexibility on what she was contributing. I don’t remember the nuances, but sadly I found it out that (at least at the time) while it seems sketchy as hell, it was legal if the company met all the requirements/followed all the rules to do this.
He’s got 99 problems and well…