Tell him he is successful when he makes enough to stop paying Social security.
That was a happy day when it first happened to me. I had no idea that was possible and called payroll. The payroll woman laughed and told me it was cute that I made that much salary, yet knew so little.
I showed her by getting to that point in March the next year.
This year, due to the pandemic, my bonuses are less, so I might have to wait until October to max out my FICA.