If a mom kept giving money to her alcoholic son, would you blame the mom or the son for the continuous binge drinking?

My friend is alcoholic and his mom is always giving him money because he is a student and despite his part time job, he can’t afford much just yet. The issue is that he is alcoholic and his mom knows that he spends most of the money to buy this crap. He’s sick, depressed and completely addicted to his binges. I feel so useless watching him this way.
DOn’t know if I should blame the mom or him fo the situation. Any thought?