There's an article with the above title on the Guardian's Comment is Free site today, with the subheading:

A thinktank that claims to be unbiased is promoting dangerous tax policies that will widen the gap between rich and poor.

I recommend it. But there again, I wrote it. That though is not the reason for recommending it. The last paragraph is. This is what worries and motivated me:

Whatever the motive, the IFS's claim to be unbiased appears to me shaky. Some of its proposals are very dangerous indeed and about as far removed from the characteristics of a good tax system for any open developed economy in the 21st century as it is possible to be.

I genuinely believe that to be true.

This debate will run.