You're absolutely right that the world of work was far from inclusive, even when the economy was better but it's worth pointing our that the loss of £7 million is a very biased figure in the current economy.

In the current economy we can virtually guarantee that each person will end up on benefits. So there won't be a saving of £7 million...

Taking this From a Guardian article:

The average subsidy for each job in the factories is £25,000 a year.

I don't know the benefits levels of the typical Remploy worker, but I'm sure some interesting calculations could be done, especially if we throw in externalities (like extra health care required because of not working, etc.)