It just gets more complicated
16million disabled includes 11% children and 45% pensioners leaving 7,040,000 ( some of whom work or can work but are economically inactive either way )
[ 1,350,000 are stay at home parents which could still work ( child age, disability etc dependent ) so still economically inactive, with some able to work. ]
once we start dissecting the numbers as you can see with the disability figures the 16million disabled is far less. @7,040,000 hence increasing your figure.
Whether the figure already takes account of the severely disabled, I have no idea.
However if we look at
7,040,000 dis + 1,340,000 sah + your figure 2,800,000 = 11,180,000 economically inactive ( over the 9.2 so lets assume the dis figure accounts for severely disabled, or sah accounts for carers ? we don’t know. )
So Let’s say
half @3,500,000 dis + 1,340,000 sah + your figure of 2,800,000 = 7.64million economically inactive
and so on and so on.
Without the disabled figures et all it’s impossible to say with real accuracy.
It is however, very high and well over 2.8million