Why can't we kill the 'Marriage Tax Penalty?'

2:00 PM ET Fri, 7 March 2014

Millions of Americans ask each year why is it so tough to get rid of the marriage penalty. As CNBC's Allison Linn reports, it basically comes down to the fact that you can't have both a progressive tax system and a system that treats married and single people differently without some falling into the hole -- and without some complaining.