Un-capping Social Security

"Now the income cap on the payroll tax has risen slowly since 1982, indexed to average earnings. If earnings continue to rise, as in the past, the cap would rise but not nearly enough to keep pace with projected Social Security benefits.
"Removing the cap entirely, thereby imposing a flat tax of 12.4 percent on all earnings - essentially a $100 billion a year tax increase on the wealthy -- would more than completely close the funding gap.
"Even lifting the tax cap today to, say, $150,000 by using a different index would solve more than half the problem."

On the PBS Newshour, Paul Solman explains how the salary cap affects Social Security.