Yes, but in the last 4 years, he has probably had free access to whatever he wants in whatever amount he wants without worrying about the cost, logistics of finding it, etc. I would guess one of those around him keeps him “fixed” so that he stays on a fairly even keel. (It just didn’t work Wed. night.) He has just floated through these past 4 years drunk, stoned, or hung over. It’s no wonder he can’t remember anything about what’s gone on during this time. 4 years of one continuous party will do a lot of damage.
I wonder if he was ever arrested for drug usage or dealing? If so, this would be part of those sealed records that he has paid millions to conceal, and would certainly explain why he did it. People have speculated about his birth certificate and college records, but an arrest for drug dealing would make those issues pale in comparison.
Ofcourse, I could be completely crazy but it's a gut feeling.