Probably less for actually finding drugs than for checking a tickbox on an insurance form for "taking measures to combat drugs" or something. It's probably just Ricky from HR's dobie-doodle mix.
I don't think it's that they had such a rampant drug use problem. I think it's just that they wanted to appease Uncle Sam so they could keep sucking on that taxpayer teat. Uncle Sam's a bit of a stickler about such things, especially when it comes to people who build rocket ships.
Well the smart money can only go inverse, and tripling down with a "I'll see your bet and raise it 500%" that a drug dog absolutely will find a shit ton of drugs in the executive areas. I'd take out the largest loan I possibly could, then go to a loan shark and do a blood contract, and absolutely muster every possible cent I possibly could after whoring my own ass out, on THAT bet.