So just make benefits be "enough" for food and bills and hope that people are sensible. Those who aren't, will suffer the consequences of their own actions.
Ok, so people on benefits can't celebrate birthdays or Christmas, and if their washing machine breaks down they can't replace or get it fixed. They can't run cars, take their kids for days out, buy ice cream from an ice cream van, get fish and chips at the sea side. Oh and almost forgot, they can't buy clothes. Also, which bills would they be allowed, gas, electricity and water are a given but what about TV license, phone bill? What about life insurance, home insurance?