In a recent presentation at the Phoenix Business Journal’s “Global Market Series” on trade opportunities with Mexico, Carlos Slim Helu said that the world economy has changed dramatically just within the past decade.

It used to be that people in the United States would retire around the age of 55. He says that people are living much longer, and that many American workers are doing service based jobs. This means that workers working in knowledge based industries should be able to work fewer days each week, for more hours a day, and work well into their 70’s and beyond.

Intrigued? Watch this video of Carlos Slim Helu’s presentation.