This is the point though, the poor have the raw end of the deal for some reason. They would never dream of raising taxes for the rich, it's all targeted at the vulnerable.
Also, a lot of the changes have been ideological. The change in benefits (to the universal credit and the new testing systems for disability allowance) has cost the country money rather than saved money, only with more damning consequences for those in desperate need.
Spending is actually up over the last 5 years compared with the government which preceded it, so I have no idea where the Tories get their 'we are tough, but we've cut the deficit' rhetoric from - they haven't.