"because the Tories are evil, child-eating monsters who hate everyone who doesn't own a manshion house and ride to hounds."
No, because that is what Tories do. Tories do not believe in taxes and public spending and do believe in market forces. On the other hand, people on the left wing believe in contributing according to the community according to ability (taxes) and reallocating expenditure according to need (public spending).
You might argue that either ideology is right or wrong, but you can't be surprised when Tories behave like Tories. The only time a Tory government wouldn't need to make cuts would be if the previous government had been Tory and had made enough cuts already.
The argument that Tories are only making cuts because "Labour spent all our money" is sounding a little bit like a broken record, when their actions are so in line with their belief system. It is also pretty obvious that a political party taking over after many years in opposition isn't going to just carry on with all the previous incumbent's scheme. You can see this with school building. It was announced as necessary because of Labour overspending, but as far as I can see they just want there own shiny new Tory school building scheme. Politicians from either side will do this even if it involves wasting money - you can't be surprised when politicians act like politicians.
It should also be noted that as not even a majority of MP's voted into parliament are Tory, you can't really expect most people to be in line with Tory thinking.