Weighed in, weighed out
The puzzle
At one company, every employee is weighed each time they come to work.
It is not a fitness campaign, and it is not a medical check.
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
They handle gold and gemstones.
Everyone is weighed on the way in and on the way out, and the difference shows whether anything has left the building in somebody's pocket.
