The restaurant business model is warped: kitchen wages are too low to hire cooks, while diners are put in charge of paying the waitstaff. So what happens if you eliminate tipping, raise menu prices, and redistribute the wealth? New York restaurant maverick Danny Meyer is about to find out.

Now and again, Freakonomics Radio puts hat in hand and asks listeners to donate to the public-radio station that produces the show. Why on earth should anyone pay good money for something that can be had for free? Here are a few reasons.