They're contributing more, but less of their percentage. Like 20% of $40,000 is less than 10% of $700,000,000.
It's bullshit. Percentage needs to increase with what you make. It will curb inflation and stop the ridiculous wealth disparity from increasing at an ever expanding rate. All the boomers were doing so great in the 1950's because the wealthy had the shit taxed out of them.