So who is really the cause of the problems of the society???
OP, the problem in society is not from one person; what I mean is that we cannot say it's only from the parents, we cannot say it's from the government alone, and we cannot say it's from the individual too.
Although parents have a big role to play when it comes to parenting, If parents don't raise a child in the right discipline, the child might end up growing up in a way that they are pleased, and it could be in a way where they derive pleasure by hurting others or growing up in a self-conviction that they can get anything they want forcefully by any means, either legal or illegal.
But if you look at it from another perspective, there are some kinds that came from a good home; they received proper home training from their humble and disciplined parents, but they themselves (the kids) don't follow in the footsteps of their parents. Friends could have influenced them or some other factors in society too.
For example, there was a guy in my home town who was a graduate with a BSc degree but got so frustrated to the extent that he became a drug addict. From being a drug addict, he engaged in some other immoral behavior that hurt the interests of others.