Re: what changed?
Presumably this is "our team vs their team" type politics. This thinking is what lets politicians of all persuasions off the hook. However bad they are they just point to someone else and say well 'they would have been worse' and some people believe them.
I think the article itself points out the same play from all the players. The upshot as far as I can tell is that politicians should not be involved in project that are likely to last longer than one parliament, probably none shorter either.