Luckily, the public are well ahead of them on this.
However, the particularly nice trick they have turned up was to say that the Liberal Democrats were the most transparent of all the main parties! (except UKIP, handily airbrushed out of the picture altogether).
Here is what Liberal Democrat, David Laws ( how exciting if this smug idiot loses his seat in 2 weeks!) said by way of return:
"We get the tick for being more transparent clearly than the other political parties. We've set out in more detail than any other party I think in British political history what we'd do on tax, what we'd do on welfare, what we'd do on spending, which areas would be protected. I think that gives us the credibility where we are saying we would invest more on things like education and the NHS for people to know we can deliver those pledges in government."
Liberal Democrats and credibility - I seem to remember vaguely last time some sort of pledge to students or something.
If the IFS says the Lib Dems are the most trustworthy on economic plans then we should all very rushing out to Tesco to buy as much cheap alcohol as we can to keep us going for the next five years...