First paragraph - Right, so if I'm understanding you correctly, your beef with PIP claimants and so on, is that these benefits are not contributions based. So how do you expect someone disabled to "contribute" to benefits which are 1. awarded on qualifying criterion, not contributions in the first place, and 2. when they are incapable of contributing because they are incapable of independently earning?
Are you seriously suggesting that disability benefits should also be strictly contributions based?
2nd paragraph - Well its no real surprise that in countries where they ascertain the number of disabled people by tallying the number of disability claimants those two numbers happen to marry up, is it?
Presumably you also believe there are absolutely no disabled people in these countries who do not claim benefit. Like, not a single one. After all, by your "logic", if they're not claiming disability benefit, they're can't possibly be disabled.
It's not "1 in 4 according to me", it's 24% of the UK population according to the DWP's own figures. But of course, because you don't see 1 in 4 people in a wheelchair you obviously know better...
The reasons for our disabled population being so high are numerous, and it's an onerous discussion I really don't have the inclination to get into on here, but suffice to say we are a hugely unhealthy country by comparison to most of our near neighbours, typical UK lifestyles are less conducive to long life and good health, and our general societal attitudes to things like economy, mental health provision, tax and spend, and the fact wealth is centred and hoarded in small parts of the country is also a significant factor in why the UK churns out people with a huge preponderance of poor mental and physical health. You can't even totally discount the impact of climate. Look at the Scandi countries and their issues with depressive illnesses. It's no different in the north of the UK, although I would not expect someone who has spent their entire life in the South or South East of England, for arguments sake, to have any inkling of that because in terms of average temps and sunlight it truly is a different world altogether. Then there's the UK's obsession with alcohol, chronic drug usage that spiralled out of control under Thatcherism and is still killing people in their 60's and 70's who have never recovered from that period.
The UK is not the same as any other country you might care to mention, so like for like comparisons are impossible, and serve no worthwhile purpose.