The Guardian's editorial today says:

Labour — a party that pussyfooted around with avoidance for 13 years — needs to convince the country it will do better next time

But as it then notes:

That will have to involve hard and specific commitments to act.

Mr Miliband is making the right noises, talking up comprehensive country-by-country reporting of corporate finances, and also signalling a willingness to act unilaterally if the PM's vaunted efforts at the G8 do not succeed.

Sadly, Ed Balls's policy papers remain overly cautious on the smallprint, replete with talk of "intelligent transparency", which can surely only be something more slippery than transparency plain and simple.

The endless questions on a tax return are tiresome, but — Labour take note — in the end the thing to do is declare on every detail.

I could not agree more.

In fact  I said something similar here.

On this one Labour has to be unequivocal, and has nothing to lose form being so.