"Frequently not paying does not make a bad father."
Er, yes it does actually. If you don't financially support your child, you're a deadbeat shit. You can tell yourself you love your DC, but love is cheap and bringing up a child isn't. I'm sick of the willingness there is in society, to excuse the way so many NRP's just wash their hands of financial responsibility for their children, it's part of the reason that 3/5 of them don't bother to pay at all and of those who do, the sums are usually derisory.
I haven't had this dilemma yet and I think even when my DC's are teenagers, I might not tell them. I'm torn between thinking that finances are none of their concern, even when they're teenagers, and bringing them up to have some sense of financial responsibility themselves - eg: if you want that DS game, you have to put aside christmas money and pocket money and save up for a few weeks, because then they value things more. It's difficult to know if telling them point blank that family finances are none of their business, is undermining the principle of helping them mature properly.
I want them to share responsibilities like housework, cooking etc., and while I don't think they should share responsibility for finances, I think it's good that teenagers are aware of them - you can't have a laptop and a guitar and a DS and a ski-ing holiday like Sophie, because our finances are different from her's and this is why.
How much do you tell them? And at what age would you answer a question directly like that? I tend to think not until they're at least 16+, but maybe that's infantilising? I really don't know.