Labour has got this arse about face. Very few people are on benefits as a lifestyle choice, benefit payments are not generous enough to facilitate a life of luxury.
Making vulnerable people poorer by reducing benefits is not likely to make their health issues magically improve sufficiently for them to enter employment.
They need support on many levels, primarily financial and medical.
If Labour really wants to improve the lot of those on disability benefits they should actually improve health care provision and increase all benefit rates so that people can afford good quality foods.
On the employment front they should also tighten up employment rights so that this particular group has more robust protections from unscrupulous employers.