What the Treasury seem to be saying here is that they're uneasy about handing over borrowing powers to the Welsh Government when their only substantial means of paying it back is the income stream from the block grant - they'd like them to have the paper round as well as the pocket money.

BBC: Pocket money and paper rounds

Hanwell Snr took a hankie from his back pocket, worked it round the grime on the back of his neck.

NEWYORKER: Hanwell Senior