The finance/banking industry has this. Investment bankers are usually required to take 2 consecutive weeks off every year. The reasoning behind it is, it is much harder to cover up fraud if you are forced to be away from the office for two entire weeks, because they can audit your books while you're gone.
Not so much that they can audit your books, but that any scheme you're running that requires constant intervention will fail and be detected by e.g. the books just not balancing at the end of the week.
I seem to remember hearing this policy goes all the way down to bank tellers.
