Re: Who smashed up the house?
Yes. though Gordon Brown is far too recent a watermark (and possibly a poor one - his main fault seems to have been that he didn't handle the media well).
I can't remember a competent minister in my entire life, and I'm not far off retirement age. Perhaps I missed one pre-thatcher, I wasn't really aware of their faults before she dispelled my parent's belief in the conservatives. But although there may be a few competent MPs, they're all culled before they reach newsworthiness.