i think teh govenment hides teh payments under the severe disability payments scheme
heres one quick story i found
100,000 drug addicts and alcoholics on benefits - Telegraph
basicly you get incapacity because your on teh sick , then you get disability allowance which is about £250 every 4 weeks and then they get carers allowance as they cant cope with everyday life and various other things which i think is about a further £20 a week but i would have to look deeper into it
not a bad income realy and on top of all thatthey get rent and council tax paid for and are probably entitled to a little income support as well
like i said not %100 on this ive just had a quick look around and it maybe that they are hiding under severe disability and using that money for booze but im pretty sure one alcholic that liked to brag said the socialservices paid himcout so it may be a seperate payment alltogether