Billionaire says we should all be working three days a week

How would you like to only work three days a week?

One of the world's richest people says we all should be doing it. Mexican billionaire Carlos Slim recommended a shorter work week at a business conference in Paraguay.

But his idea comes with a catch.

The much shorter work week would be offset by longer work hours, like perhaps 11 hours a day, and a later retirement age of 70 or 75.

But he says it'll make life better for everybody.