So basically the Govt is expecting someone being paid jobseekers allowance to pay a small weekly proportion of it towards their weekly rent, which will cover the reduced amount the parents will be receiving directly from the Govt. Don't see any problems with that myself.
Once I left school and was out in the workplace I was always expected to make a contribution towards my upkeep at home and I imagine that would have been the case for millions of people going back generations. The Govt pays these young adults a benefit as they are not working - they then have to budget using that money to pay their bills. This should just be one of them. If nothing else it is a good life lesson that there will always be bills to pay and you can't just freeload. Better to learn that early on I would say.
I started work at 13 doing a paper round and from that age I had to hand to my mother half of what I earned for my upkeep and I had to pay every week until I got married and left home. I did exactly the same with my children, it taught them the responsibilty about money and they learnt the same as I did that nothing is for free in this world.
I don't see the issue. The article states: "Current rules mean a deduction is not made if the young person is claiming Jobseekers’ Allowance." Perhaps I've mis-read it.
I think the rules change when the Universal Benefit system comes into operation.