The best thing for the individuals concerned, and for society as a whole, is to actively encourage those on incapacity benefit who are able to work to get back into work, while providing security and a decent standard of living to those who cannot.
The Civil Service is a vital economic asset to the UK - firstly, in the way it creates a framework for excellence in service delivery and secondly, in how it helps organise the best way to deliver modern public services on which both businesses and individuals depend.