There is - if they undercut a German.
In the English-speaking world our leaders like to talk about creating "wage restraint". I'm sure German has a similar expression. I'm also sure the CDU have promised it to major donors to console them in difficult (self-inflicted) economic times.
Disclaimer: an old friend of mine is the daughter of an SPD MP. She insists they'll never ally with CDU, but she's a primary school teacher and usually wrong about everything. I bet the SPD and CDU ally rather than speak to AFD. Sorry :-p