Erm, you mean what Arthur McBride said to the recruiting sergeant wasn't political?

Says Arthur, I wouldn't be proud of your clothes
You've only the lend of them as I suppose
And you dare not change them one night or you know
If you do you'll be flogged in the morning.

Or what the woman being left behind said when the captain called all hands:

What makes you go abroad, fighting for strangers?

was purely self-seeking?

Sounds like quite vociferous political protest to me.