sentences:  Following the introduction of ESA, the number of remaining Incapacity Benefit recipients dwindled, largely as they came off the benefit upon reaching the State Pension age.By early 2011, the Incapacity Benefit caseload had shrunk by more than 500000, and the ESA caseload had grown by the same amount.The Coalition government decided to implement the plan to reassess most remaining Incapacity Benefit recipients.