To be fair to Mr Politician, the media have been hyping this up constantly over the last couple of days, and I really think they bear quite a lot of the blame for this. Not to mention the tanker's union!
Re. the fuel tax - yes, it's true that sales of fuel have rocketed over the last few days, but actually people aren't going to be buying more fuel in the long term than they would anyway. They are just buying it now, rather than later. So in the long run, I suspect the government won't be making much extra if at all.