In established markets, everyone gets paid pretty much what they are worth. Marketing can skew this and there are always temporary exceptions on specific sales, but when you're talking about putting cables in walls and hanging monitors in public areas, there is profit, but generally no economic profit. In theory and on average, one dollar less and I won't send my tech out to your place to do the work. One dollar more and I'm ahead of the game. We all want to be ahead of the game.