Shopping is good times.  "Shopping Addiction" has a more psychosocial perspective when people refer to it though.
I must adsmit that i have never heard of anyone having a shopping addiction.
It's a concept similar to "Compulsive Buying Disorder" which has to do with impulse control more than anything.
Is this type of disorder widespread in the population?
It depends on who is diagnosing them.  Some would say certain addictions are nothing more than behavioral manifestations brought about by ones environment.
so a magician could be a compulsive shopper?  I am afraid i don't understand.
Sure, anyone with any occupation could be addicted to shopping.  It is however a drug free addiction like gambling.