There's always ending cash benefits - rent, council tax and power paid directly to the source and food/toiletries/etc. purchased with a debit card and which doesn't allow you to purchase cigarettes or alcohol on it, free bus pass, etc.
If you have the basics provided for you, why do you need cash? You can go and work for that.
There're also measures you can take to limit the amount of time one can spend on full benefits.
Things like that might be the way forward.
Because the system really was introduced to be a temporary/stop gap measure if you and your children are able-bodied and fall on hard times; not a lifestyle.