I think the Torys have always been able to keep their voters consciences clear when arguing for policys that bring poverty etc, EG Cameron arguing we can't leave the debt for our children and g/children to pay off. that gave people a clear conscience to support austerity, it gave people a clear conscience to ignore the rapid rise in food banks.
JRM thinks foodbanks are rather uplifting and they show we are a compassionate country.
I had Attlees opinion long before I heard his statement on charity.
"Charity is a cold, grey loveless thing, If a rich man want's to help the poor then he should pay his taxes gladly not dole out charity at a whim."
Food banks do not prove we are a compassionate country, the average person donating to a foodbank is acting decent, anyone opposing tax rises for the rich isn't helping the poor with the odd drop off of food when the mood takes them, it should not give them a clear conscience dropping off the odd bit of food to the local foodbank.
Most people do care but they also have other opinions, the Torys give them a opinion to clear their conscience for supporting policy's that bring hardship.