Another big test for work culture

So this was fake, but this is real.

The UK is running a four-day work week pilot with thirty companies that will start in June and run until the end of the year. 

And no, it's not four ten-hour days. It's four eight-hour days – for a grand total of thirty-two hours per week. 

Though the workweek will be twenty percent shorter, employee benefits and pay will remain unchanged. 

So what's the catch?