I don't think anyone has said anything about 'people from the local Council estate' or anyone causing more trouble than anyone else. I would have thought almost everyone would like an extra ?1000 for their child's future, even if it is held in trust. There can't be many people who can't understand the idea behind that (even we Council estate underlings).
Whether or not the money would be in trust is really rather beside the point, actually. There's no reason the payment shouldn't be a lump sum paid immediately, really. The point is about incentivising people to learn how to be good parents, from which we could all benefit.
Don't think of it as a childlessness tax, Baboonery. Think of it as an investment in the workforce whose taxes will pay for civic amenities after you've retired.