Pensions more than doubled between 1997 & 2010. Other benefits practically doubled too.
Ditto with health.
Pensions 1997 = £49.4 billion
Pensions 2010 = £116 billion
Health 1997 = £50 billion
Health 2010 = £118 billion
Benefits 1997 = £55.7 billion
Benefits 2010 = £106 billion
Source 1997
Source 2010
Even if you account for inflation, we've spent a lot more. If you include everything Labour have took our government spending from £312 billion per year to £660 billion per year.
At the same time total tax receipts in 1997 were £316.2 billion and in 2010 were £550 billion. source - Guardian
What this means is that Labour inherited a balanced budget and in the time they were in power managed to double our spending without a corresponding increase in taxation. In fact by 2010 we were £110 billion a year out.
Now you may argue that the Tories would have done exactly the same and the truth is that we'll never know. But the fact is that Labour were in charge during that time. They inherited a balanced budget, they were responsible for government spending and they ripped open the nations chequebook and left us with a large deficit.