I was genuinely surprised that they use that phrase - what does socialism mean in that context? The NHS, opposition to zero hour contracts, basic human decency?
I think they're very much in favor of redistributing wealth. It's just the socialists' preferred direction of the redistribution that they don't agree with.
Honestly, they've been cutting government expenditure pretty heavily across the board (to the best of my knowledge) and military expenditure is way down.
Firstly, remember that "socialism" is a dirty word in US politics, but not in EU politics. The UK Labour party does claim[1] to be a socialist party. Their homepage[2] has a link to "affiliated socialist societies".
However in this case, the tories are just scaremongering.
[1] They're not really socialist anymore, since Tony Blair & New Labour back in the 90s at least.