THE progressive reformer and eminent jurist Louis D. Brandeis once said, “We may have democracy, or we may have wealth concentrated in the hands of a few, but we cannot have both.” Brandeis lived at a time when enormous disparities between the rich and the poor led to violent labor unrest and ultimately to a reform movement.

Over the last three decades, income inequality has again soared to the sort of levels that alarmed Brandeis. In 1980, the wealthiest 1 percent of Americans made 9.1 percent of our nation’s pre-tax income; by 2006 that share had risen to 18.8 percent — slightly higher than when Brandeis joined the Supreme Court in 1916.

Congress might have countered this increased concentration but, instead, tax changes have exacerbated the trend: in after-tax dollars, our wealthiest 1 percent over this same period went from receiving 7.7 percent to 16.3 percent of our nation’s income.

What we call the Brandeis Ratio — the ratio of the average income of the nation’s richest 1 percent to the median household income — has skyrocketed since Ronald Reagan took office. In 1980 the average 1-percenter made 12.5 times the median income, but in 2006 (the latest year for which data is available) the average income of our richest 1 percent was a whopping 36 times greater than that of the median household.

Brandeis understood that at some point the concentration of economic power could undermine the democratic requisite of dispersed political power. This concern looms large in today’s America, where billionaires are allowed to spend unlimited amounts of money on their own campaigns or expressly advocating the election of others.

We believe that we have reached the Brandeis tipping point. It would be bad for our democracy if 1-percenters started making 40 or 50 times as much as the median American.

Enough is enough. Congress should reform our tax law to put the brakes on further inequality. Specifically, we propose an automatic extra tax on the income of the top 1 percent of earners — a tax that would limit the after-tax incomes of this club to 36 times the median household income.

Read More: http://www.nytimes.com/2011/12/19/opinion/dont-tax-the-rich-tax-inequality-itself.html?_r=1

Also See: TONIGHT 12/20 9PM EST Free 45 Q&A: “How to Break into Hedge Funds”