Now, I do fully appreciate that Labour hate the idea of devolving anything meaningful to the Scottish Parliament. That's fine, that's their prerogative. It's a big part of why they keep losing elections, so to some extent it should even be encouraged. But if their whole strategy for next May is going to be based on the claim that the beastly SNP could reverse the Tory tax credits cuts in full but are refusing to do so, isn't it rather obviously a stupid idea to vote against an SNP amendment to the Scotland Bill that actually would have devolved power over tax credits to the Scottish Parliament? Apart from anything else, the amendment would have been defeated anyway, so it seems a bit pointless that they've sabotaged their own strategy just to make the Tory majority much bigger than it otherwise would have been. Now the SNP will simply be able to say : "So you want us to use a power that we don't have, and that you voted against us having on the 9th of November?"
At the very least, couldn't Labour have abstained or something? They're usually really good at that.