Canceling House Shows

WWE postponed the Monday night SmackDown House Show… err… Live Event in order to have a bunch of SD guys on Raw for no good reason.  While it almost certainly won’t do anything for ratings, how does that affect the people who were supposed to be on that show? 

Do Kofi, Roman, etc. get paid any differently from doing Raw instead of the house show?  And isn’t the move taking money out of the pockets of all the wrestlers who just got the night off but still couldn’t go home because they have to be at SmackDown on Tuesday?

I'm pretty sure Vince doesn't give any consideration to that whatsoever.