I'm curious if any companies have required (minimum) amounts of vacation. Taking a break seems to be a general positive for productivity, but people with unlimited vacation seem to not take it. What if you were obligated to?
Both of those things, plus many more, require daily or weekly effort. If you're out of the office, something will go amiss and you'll get caught.
While it's not mandatory to take that leave, it's a very good excuse for why you want to take several days off.
See more here: http://www.opm.gov/policy-data-oversight/pay-leave/leave-adm...
It's harder to cover up fraudulent trading if you're not there.