That's not what she's saying though is it? I don't agree with her, but her argument is that the army could run services to get workers like doctors and nurses to work while the strikes are ongoing.
That's a world away from "turning the army on law abiding UK citizens". You make it sound like she's urging them to open fire on the picket lines.
Apparently the army's railway squadrons were disbanded in 2012. When the Lib Dems were in government. So I don't think it would work really would it?
Even if you think it would work, it's an appalling position for a supposed "liberal". The armed forces are meant to be there for the security of the country. Not to be union busters on behalf of bosses handing out mass redundancies.