[1.0] .xml problem with knights of asok/hunters?

I was looking in coreunitmonstertypes.xml. I noticed that trained monster units like ogres, trolls, and storm dragons have the line:

<HasWages>0</HasWages>

Whereas Knights of Asok and Hunters (the units that come merc camps) have this line instead:

<WageOverride>0</WageOverride>

Is this why Hunters and Knights of Asok still cost wages? 

Maybe there are deeper hard code reasons behind this, maybe not. Hope this observation is helpful.