I honestly doubt that she's only getting the basic JSA + housing benefits.
I just posted the breakdown of the cash you're allowed when unemployed, and it definitely doesn't cover the cost of a holiday in Spain.
I went on holiday when I was on the dole, but only because I had 'other' money-making activities and I got my PPI money back. I'd always worked since being in England before that and paid my taxes, so I don't see it as a negative thing. I was honestly trying to find a real job + working at the same time (sort of).
Basically the conclusion to the benefit issue seems to be wiping out half the population of scotland, north of England and NI, don't think there would be too many complaints...