Ok let me rephrase, accountability at the time of expenditure rather than a few years after the projects haven't been delivered to budget, in a timely manner and an acknowledgement where they have failed. A clear plan of how the failure will be prevented in the future and how the financial position will be recovered rather than just writing it off.
Its dead easy to keep spending money until you've used up your budget where oversight is poor and then ask for more, cap in hand a few years later, whilst only delivering a small percentage of what you promised to do. This issue is true not only for large projects like HS2 but for the thousands of projects run by both national and local government. I see it day in, day out with transport projects, many only costing a few million, where they are started, committed to in government plans, developed up to a AFC design, then shelved, never to be seen again. The same with defence projects, refits, facilities improvements, started and stopped continuously but its only a few million here and a few million there so you know its just wastage...
All I want for the tax I pay, is for people to say what they are going to do, deliver it on time and as close to budget as possible. It seems however like that is too much to ask.
I do agree that government should be boring, as with all the best leadership what you want are boring leaders that get on with the job, deliver and carry on quietly making things better and letting the actual results do the talking. The problem is everyone wants to be a celebrity these days.