Catch-22.

In order to be given disability you must jump through so many hoops that no one whom is actually sick could complete them. Or how in unemployment you must prove you must spend your time proving you are looking for a job so you cannot spend you time actually looking for a job. My personal fav because its almost universal is sick-day policies that codify 100% abuse of sick days because people are punished for not using them because some people were "abusing" their sick days.

In the case of the book to be discharged from military service they must prove they are insane which no insane person could complete.