Ah, well, she's just a Communist, no worries if she comes back or not I guess! One less fifth columnist to worry about if she dies.

(The bits about the British Communist party make it sound like a particularly sad parish jumble sale, which make the callousness with which everyone uses Liz even worse somehow, because the Party in general and Liz in particular are not any kind of threat.)

And Leamas is like "fuck you, not coming back," and GOOD FOR HIM.