That depends, for the most part being on welfare doesn't allow for an extravagant lifestyle at all. Especially if you are a single person living alone.

Job seekers allowance (the standard benefit for the unemployed) will net you around £50 per week. Out of that has to come all of your expenses including energy , food , travel etc. You may be able to get rent covered by separate housing benefits.

Of course the right wing press will often print examples of families on benefit who are pulling in large sums of money from the taxpayer. I think in most cases these are cherry picked cases.

You do of course get more money if you have children, so perhaps if one can produce enough children to benefit from economies of scale it becomes more likely.