managed care organization emphasize drug treatment over counseling for children with behavior problems because?

Isn't it cheaper and more effective in the short run? I don't know if anyone ever kept stats on long term costs.

Behaviour modification in a professional counseling setting is very costly, and in my experience, seldom produces tangible results, especially when the issue is substance abuse, stealing, violent behavior, sex related behavior, or other anti-social behavior.
Cost effectiveness is a very difficult concept when applied to mental, emotional, or behavioural processes.