How to lower the sickness absence statistics

According to my father the social services' reasonably effective way of deterring false sickies and such is to interview each person that takes one, asking them basic questions that any genuinely ill person could answer. For example, what exactly was wrong with them, how they sought treatment, whether or not they saw a doctor, etc.

It's pretty basic stuff, but the basic confrontation is supposedly enough to deter most people from pulling a false day simply because they'd have to directly lie to a manager's face. The phone is not acceptable; the worker has to sit down with a manager and go through a short interview about it.

Jam it back in, in the dark.