To be fair, increasing GDP isn’t the same as extracting money out of people. I think the point is that removing barriers to people getting to workplaces allows the workforce to grow and economic activity to grow as a result.

That said, I doubt the numbers. There might be 2.8m disabled people, but they’re not all not working because of the one issue. I suspect many are already working. Some will be home workers like myself and some will get to work by other means. Some won’t be able to work for other reasons.