Billions of reasons to be reckless

Hi, everyone. It's Shira. "Uber, but for short-term restaurant and warehouse jobs," sounds like a startup pitch circa 2015. But the actual Uber Technologies Inc. is now expanding a test of a temporary staffing program.

I've been skeptical of Uber and other logistics companies that say they can capably match supply and demand for a host of goods and services. But this could work. There are several million drivers in Uber's network, some of whom might be interested in picking up other flexible work. With U.S. unemployment at low levels, many businesses are eager to find good workers, too.