I don't think parents set out with this intention initially. But then once they realise what a gravy train it is many see milking it.
Friend of mine pushed to get an autism diagnosis for her eldest DC from a very young age. Admittedly, there were some behavioural indicators for autism. But now he's got that badge for life. But by the time he reached teenage years he'd blossomed into a very neuro typical teenager, full of self confidence and social awareness. If he's autistic, then half the population must be too.
His mum has continued to claim DLA for him (a benefit that's supposed to assist with additional care or mobility needs over an NT child), even though there aren't any extra needs, never were. He's now 15 and thoroughly independent for his age, no extra expenses. But DLA assesment is simply have a diagnosis and fill in a form. The claimant is supposed to notify if there's a change in circumstances that affect the DLA eligibility, but no one ever does. And once you're receiving DLA, it then entitled you to extra UC benefits as well. And on top of that, friend has used ds's diagnosis to get priority on a larger council house, on the grounds that her DC can't share a room because of his Nd. So the 3 of them are now living in a new build house designed to accommodate 6 people. Meanwhile, I know of families of 8 (6 dc) overcrowded in a small 3 bed house, but because of the housing shortage and lack of a diagnosis they never become a high enough priority for a bigger house.
Now her eldest DC is approaching the age where DLA ceases (and then the child has to claim disability benefits in his own name, which he almost certainly won't meet the threshold for being eligible), she's pushing hard to get a Nd diagnosis for her younger DC in order to keep the gravy train going.
On paper, her family probably meets the definition of living in poverty, but in reality she can afford luxuries many of us can't - a camper van, several rounds of cosmetic surgery, luxury foreign holidays, and rainy day savings stashed in cash to hide from the benefits office.
A few weeks back I was talking to this friend and we got on to the subject of how my two DC are having to cope with sharing a smallish bedroom (half the size of what each of her DC have to themselves) and she retorted that I need to 'get a bigger house'. Which would be lovely, but I've stretched myself financially to be able to afford the mortgage on the house we have, up sizing is not a possibility. I had to bite my tongue not to come back with a snide remark about her playing the system to get her spacious house at the taxpayers expense, it's not so easy for those of us that have to pay our way legitimately and without state assistance.