I used productivity data to illustrate what many people back in the mid 2000's recognised as a given which was an overloaded public sector where money was spent without proper scrunity. The business I now run was a beneficiary of this... It was common knowledge that if it were a local authority project the price was inflated by 20%.
Of course our debt has a relationship with the amount we can spend. Our interest bill is currently larger than our transport, housing or policing budgets. How big do you think is too big? Plus even if you believe the deficit didn't matter, why not combine responsible spending increases over 6 years with tax cuts targeted at poorer people? It's a hell of a lot easier to reverse a £50b per annum tax cut when a recession hits than it is to try to claw it back via cuts.
I don't think it's the benefit of hindsight that shows spend was far too high. As I said every family knows that when times are financially good you put something away for when times aren't so good.
The problem was Blair genuinely (and stupidly) thought it was the end of boom/bust cycles. Him and Brown were naive in the extreme.
Ireland's tax to GDP ratio is around 23% compared with UK over 33%