I didn't say anything about seeing kids with bandy legs. But I can read the stats, which do support a rise in these 'Victorian diseases' since the Tories, and which do demonstrate economic correlation. Hence I'm weighing in.
*But between October and early March we do not make enough vitamin D from sunlight. Read more about vitamin D and sunlight.
Vitamin D is also found in a small number of foods.
Sources include:
- oily fish – such as salmon, sardines, herring and mackerel
- red meat
- liver
- egg yolks
- fortified foods – such as some fat spreads and breakfast cereals
Another source of vitamin D is dietary supplements.*
At least be accurate if you're going to be so basic. Rickets is at least in part a matter of nutrition. How much salmon and steak do you think poor kids are eating?
Economics has a bearing on how much time you spend outside. For simple e.g., if your parents both work full time, you'll be in wraparound care at school, so in the winter you may both go to school in the dark and go home in the dark, end even in the summer if you're picked up at 5.30 and go to bed at 7.30, assuming you want to get dinner and homework done as well, that's not a lot of opportunity for soaking in the 'freely available' sunlight then is there?
And at the weekend, if your parents haven't got any money, you're more likely to stay indoors using the things they've already paid for - gaming stuff, toys, books, telly sub, to say nothing of FOOD - rather than going outside (no garden in tower blocks, lack of green spaces in urban areas, fuel costs enormous, public transport failing) to somewhere you can enjoy the sunshine for free? And assuming you make it to the nearest wood or public park, that's all you'll be doing - no activities, no stop for coffee and cake, no lunch out, none of all the other little expenses middle class families think nothing of that makes a day out with the kids more manageable and enjoyable for everyone.
And before you start I'm not saying it's impossible for poorer people. But it's harder. everything is harder. And some people strive their socks off and do it anyway, but most people - like most middle class and most rich people - take the path of least resistence. And with little to no disposable income to smooth the way, that path is a lot less beneficial for the poor than for the rich. Which is why we look at things at the population level, not at the "well I grew up in a slum in 1950 and spent every day out on my bike and my mum always had a good dinner on the table, even if she had to go without herself, if she could do it anyone can" anecdata level.