Imagine you are a low-income country. You suffer from a heavy debt burden. You’ve been trying to catch up to the more affluent countries for decades, but you’ve been unsuccessful, mainly because of that debt hanging around your neck like a giant millstone. And you...

In a fit of madness or just plain desperation, you’ve enrolled in a get-rich-quick scheme. All you have to do is sell some products, sign up a few friends, and make some calls. Follow that simple formula, and you’ll soon pull in tens of thousands...