It ignores it, but not in favor of the bottom 90%, it looks like the numbers for % of pension entitlements have dropped significantly for the bottom 90% and went up only for the top decile.
Indeed, and if you divide that pension cashflow by, say, 4%, you arrive at equivalent wealth figures that can be very significant. Say somebody retires from the military as a low-ranking officer. You don't think of them as particularly wealthy, but once you value their cashflow, you realize they're loaded.
The value is money/time. $1M over 40 years is only $25,000/yr, minus inflation and tax. Wherever that person lives, I don't suppose they feel 'loaded'.