I suspect not everyone shares your drive and abilities mate. People facing this same decision at 18 years old, fresh out of school with minimal or no qualifications and no job, who haven't yet paid much into the system - should they take the same attitude towards the risk that you do? Are their odds of beating the risk as good as yours? What is the impact to them, their hypothetical child, the welfare state's limited pot of money and society as a whole if they don't in fact use their new-found parenthood as a catalyst for earning more and bettering themselves for their child's advancement?Totally this.
Firstly I had total confidence in my own abilities to generate income, and secondly in the very unlikely event it was required my taxes paid more than justified state support.