Sorry for my ignorance... what's the usual meaning of “Those hands will be in anybody’s pocket.”
I would add to that, her party (the SNP) has taken a decidedly 'tax and spend' approach to government (or possibly just tax and tax), so that 45% of people in Scotland will soon pay more tax than people in the UK. So dipping into Scottish pockets as well.IMHO:
It is a play on the idea of the Scottish stereotype of being tight with money and then tying that to the idea that England props up Scotland financially. So she'd be helping herself to money out of other people's pockets.