That isn't bad.
After tax income would decline by 0.2 to 1.6% for the bottom 80% of income earners due to higher taxes. The 80-99th% will also see similiar declines of about 1.6%.
However the top 1% will see an 8% decline and the top 0.1% will see an 12% decline in after tax income. So if that is true, that is fairly progressive income tax distribution. However I don't know if the 95-99% should see the same tax increases (as a % of income) as the bottom 30% or so. But the top 1% will see tax hikes under the plan.
Also the SS plan on page 44 attempts to make SS a more progressive system.
In order to control costs, the Commission proposes gradually moving to a more progressive benefit formula that slows future benefit growth, particularly for higher earners. Currently, initial benefits are calculated using a progressive three-bracket formula that offers individuals 90 percent of their first $9,000 of (wage-indexed) average lifetime income, 32 percent of their next $55,000, and 15 percent of their remaining income, up to the taxable maximum. The Commission recommends gradually transitioning to a four-bracket formula by breaking the middle bracket in two at the median income level ($38,000 in 2010, $63,000 in 2050), and then gradually changing the replacement rates from 90 percent, 32 percent, and 15 percent to 90 percent, 30 percent, 10 percent, and 5 percent.