Eli 5 Imagine you need a hall pad in order to get out of class . Billy and all the other tough kids seem to always have hall passes signed by Mr . Smith . Other students may also have a few hall passes by Mr . Smith from time to time , but for whatever reason , the tough kids always have Mr . Smith hall passes . The Principal learned that the tough kids are threatening to beat up other kids in order to get them to hand over their hall passes from Mr . Smith which is why they have so many . Obviously , they are breaking the rules by doing this . The Principal decided that every other teacher can continue using hall passes , but since Mr . Smith ' s hall passes always get stolen and used for the wrong purposes , hall monitors will no longer accept hall passes issued by Mr . Smith . Normal High value bills will no longer be accepted by businesses and banks . While perfectly legitimate people may have these bills , criminals and drug dealers the tough kids are more likely to benefit from the existence of these bills . If you worked for a week , you could have your earnings automatically deposited in your bank and you ' d be fine using $ 5 or $ 10 bills when you need it . If you sold $ 10 , 000 worth of drugs , someone can pay you in cash , but it is much more beneficial and concealable if you received x 10 $ 1 , 000 bills instead of x 1 , 000 $ 10 bills . By restricting the acceptance of high value bills , they are greatly inconveniencing people who profit outside of the law , and thus are discouraging that kind of behavior .