I don't dispute that but why should I pay more tax than someone who has wilfully become more of a burden by having kids? That's the point I was getting at.
Because a viable, successful and fair society is not all about taking from that society, the argument that you put forward is flawed because because unless people pay proportionately their fair share (based on their relative income) then society cannot effectively support itself and we fall into a Dickensian dystopia of haves and have nots.
Children are the bedrock of a continued stable society, without them your publicly funded services will be unable to support societies needs as the costs outstrip the available taxpayers....you will be forced to work regardless of your age and only the very top earners in society will benefit from society.
No one is forcing you to have children, and parents pay taxes also, in many cases more than you do....those children also grow into taxpayers, again contributing to their services past and present and your future services. You are not funding anyone, you are funding yourself and the services you use and have used and will use in the future, just like the Parents and the Children when they become Adults.....