Personal Finance Advice from Freakonomics: Save Less

Practical reasoning here. Not sure I entirely agree. I mean it makes sense that you make less at the beginning of your career, but if you can get your savings to grow faster than your income over time, I would imagine it makes more sense to save for retirement. Of course, the advice came from Milton Friedman who indirectly gave the advice to Steven Levitt - who I imagine are all working at places that provide pensions...