Efficiency through trust

Jason Kottke recently wrote about an interesting phenomena -- A Manhattan donut-cart guy who trusts his customers to make their own change.

The result? Twice the throughput, perhaps even twice the business, and undoubtedly more money for the Donut Guy.

While just one tiny example, of course, this nonetheless struck me as interesting from business and societal points of view. And yeah, it's just plain cool!