These jails were really the world best HRD Training Institute, in a negative way
A petty offender like a pickpocket in jail learnt, burglary and kidnapping.
The members of FACULTY were fellow prisoners, each one an expert in committing one or more crimes and was teaching on committing bigger crimes
There were informal trainings and brainstorming sessions on how to commit bigger crimes easily
These prisons are not CORRECTIONAL CENTRES but are INCORRECTIONAL CENTRES HRD means the opposite here
The acronym HRD does not represent Human Resource Development but instead here it stands for Human Resource Decline, Decay & Destruction
Prisoners needed money in JAIL for
Smoking
Sex
Gambling
Making mobile calls to outside world for talking with their family members & crime-mates
Eating home made food etc. etc. For earning that money, they had to commit crimes outside the prison, by proxy via their crime-colleagues living as free-birds.