U.S. remains a dynamic society

A new study of income mobility by the Treasury Department shows that the U.S. remains a dynamic society marked by rapid and mostly upward income mobility.

Americans on the bottom rungs of the economic ladder continue to climb into the middle and sometimes upper classes in remarkably short periods of time.

The key point is that the study shows that income mobility in the U.S. works down as well as up-another sign that opportunity and merit continue to drive American success, not accidents of birth.

The "rich" are not the same people over time,

As the Treasury data show, we shouldn't worry about inequality.
We should worry about the people who use inequality as a political club to promote policies that reduce opportunity.