Change the Goalposts fallacy.
I asked specifically about the Contaminated Blood Scandal, for one (and also Post Office by extension) - these were not realistically within the realms of "choice" and were explicitly not budgeted for by Tory when the commitment was made. Amongst the other deliberately concealed unknown unfunded spending commitments were the cost of Public Sector pay rises - and NO, I'm not referring to any pay dispute settlements - that's just a common misinformation piece - I'm referring to just the normal 12 month-cycle pay review body reports. Most of the Pay Review Body reports were already published and simply placed in a drawer and not released or disclosed by Tory to the OBR. So the content of the Pay Review reports were an unknown unfunded commitment. Labour did "chose" to honour the recommendations of the Pay Review Body reports, but realistically, there is no precedent for not doing so - and whichever way they had chosen they would've been bummed relentlessly in the news rounds by the likely suspects either way... misinformation rules, right?
It was those kinds of things that really had to be honoured and brought into the costed budget instead of being left unfunded to be paid for out of the non-existent contingency fund. Like I said before - this is a mature and reasonable budget.