Disablity benefits may well be frozen, but the targets still exist for how many people need to be shifted onto JSA and/or lose their DLA regardless of how their disability affects them. The official stance seems to be to get ATOS to give out their miracle cure for all sorts of illnesses (including terminal in some cases) to help the DWP reduce the amount of people on sickness benefits so they can save like £20 per person per week by sticking them on JSA when they are unable to work. Then sanctioning them (thus saving more money) for being too ill to work.
And of course pensions are frozen. Pensioners make up the majority of voters, pensions will never be touched