Serious Addiction to Gear

I would like to know if gear addiction is like shopping addiction, or any other form of clinically defined addiction. A friend of mine seems to have this problem, not being able to control his urges to just buy the first thing that he feels he needs. It is starting to affect his personal relationships. Should I approach this problem like a drug addiction? I want to help him help himself. Has anyone experienced this either firsthand or by association?