DrDeth
You perhaps betray a lack of knowledge about offenders, it is a bit of an oversimplification to state that one type of offender is responsible for one kind of crime.
That said, every prisoner is assessed with regard to the risk he(and it usually is a male) presents both to staff and other inmates, along with the possible escape risks and the severity of the offence, and placed in the lowest security rated prison appropriate for him.This means that terrorists, or serial killers, or serious sex-offenders, or organised criminals will not be placed alongside low risk inmates such as fine defaulters, or traffic violators.
Drug offenders are very often among the most violent, but yet also among the most petty and fairly harmless criminals, there is just such a wide range.
‘White collar’ criminals may be responsible for some horrific crimes, I can think of one in the UK who has swindled many thousands of elderly out of life savings, and the effect on them is pretty near to murder with all the worry and poverty he has caused.
There are those who have been caught up in one-off events, like a car driver who killed six cyclists a year or so ago, but then the risks he took with drinking meant that it was almost inevitable that he would be involved in a serious road incident.
There are so many crimes, so many criminals, all of whom are differant that you can only speak in the widest of generalities, but it is fair to say that around 80% of criminals return to jail after release, that their education is poor, that around 33% of the prison population were brought up in state care(around 66% of children who were in state care go to prison), that most started offending at around 12 years old, and the link between poverty both financial and in family life is very strong.
Poverty does not necassarily cause crime, so much as poverty is the result of crime, and poor education is also the result of crime, rather than what seems at first obvious that crime is the result of poor education.
Folk mistake cause and effect, and at present there is a huge push to bring better education to prisoners, but by the time they get to regularly spending time in adult prisons, they have been offending for a decade already.
Once a prisoner becomes a regular, it is about time to keep them out of the way until they are pretty fed up of jail, and that usually means until around 35 to 40 years age.
We keep letting them out, giving them more chances spending huge amounts in tackling the effects of their latest offences, finally trapping and reconvicting them, it’s all a waste of time, it would be cheaper to keep them inside for much longer in lower security prisons.
If you really want to keep them out of the career path of crime, then you would have to direct your resources toward things like preventing school truancy and ensuring that there is adequate teaching staff. (virtually every criminal I meet began this way)
With some children, 30 or so in a class is way too much, it would be better to reduce the student teacher ratios to around 10 or less to one.(but very expensive)
It is no accident that many fee paying schools in the UK have such staff pupil ratios, and that the wealthy regard these schools, whilst hugely expensive, as being the best education that money can buy.
I wouls also put a lot more effort into jumping on shoplifting, this is probably the main route into crime for most career criminals.
As I say, by the time they end up in adult prisons, its way too late and they may as well stay there until they grow out of it.