I do so hope that Scottish Labour are learning from that nice Mr Cable's travails over his mansion tax. I appreciate that whatever system of local government finance Labour come up with will be different from that proposed by the LibDems.
The point is, however, that you need to have thought it through. If it is to be based on property capital values, you need to be able to discuss the valuation process and, most importantly, the revaluation process (bearing in mind that the present council tax system is based on 1993 values). And you need to be able to say what you will do about the property-rich, cash-poor old widow who would otherwise suffer severely. And, if you have a rebate system, how you will finance it.
But we can trust Mr Gray and Mr Kerr to have done their homework. Don't you think?