That is probably a bit low, but it depends on assumptions as to interest rate & when the person is eligible to start drawing. As a quick example, I think he's 60; assume he can start drawing in 5 years, when he turns 65. At that point, his life expectancy would be about 17 years, so at $165k annual he'd be getting $13,750 per month for 204 months. At 6 percent, the current value of that cash flow stream would be about $1.3 million. If you use the $800k mentioned in the original article, with the same assumptions as above it would be about $8450 per month, or about $100k per year.
That's not wealthy by any means, but $100k per year (plus SS benefits that are probably another $25k), he's not going to be eating dog food in his retirement.