@MarbleHunt
I spend much of my time reading economic reports so can’t remember where every statistic has come from but your claims here have been manifestly false as any glance at the data will show you.
What you say you want is good quality debate informed by facts, and how you behave is general character abuse (not specifically to me, but your posts here are littered with complaints about the stupidity and jealousy and economic illiteracy of others), spurious tangents (the first few of your numbered points rebut claims I haven't made), appeal to authority/knowledge (I spend lots of time reading stuff but can't remember where) and partial presentation of the data you do provide.
Let's step back and do this carefully:
The claim you made that I questioned: "disability benefits are broadly in line with the levels they have been at since the 1970s as a proportion of GDP".
I provided an OBR source, with link, for data that shows disability benefits rising from 0.2% to 1.6% of GDP. The precise thing you are making a claim about (though it only goes back to 1986). If you think something happened between the 1970s and 1986 then let's look at that. That's not what you did though.
In return you paste screenshots that you think contradict this. The mature way to proceed is: this other data says something different, let's work out why. Is it measuring the same thing? Is it a difference in sources, etc. Instead you went straight for the line that my stats are obviously false as anyone would know at a glance. I think this is bad faith from you, or bad reading.
From the parliamentary report you yourself screenshotted: "There have been significant rises in both disability and incapacity benefits". Again, disability benefits. The thing you make the claim about.
From your own chart: working age disability benefits up from about 0.2% to 1% of GDP since 2000. All work-related health-related benefits up from 1.3% to 2%.
The data you yourself chose don't support the point you made. You've added in various other claims that rebut points I wasn't making. OBR says seven-fold increase since 1986, Parliamentary report says four-fold increase since 2000. Neither supports your claim.
I think you need to get off your high horse about other people's ignorance and numerical illiteracy, and practice what you preach a bit more.