Incapacity benefit used to be the basic benefit for disability that led to inability to work. Those with insufficient working tax credits would need to claim a means tested benefit - Incapacity benefit as it used to be. Only those very disabled by ME could attempt to claim the extra money provided by DLA. It is a difficult benefit to get. You would need to be pretty much housebound. 6X more on IB than DLA sounds about right to me.