The cost of plywood is at least double the cost of MDF, so you get to decide what you want to pay for.
I don't know what you earn, but you may have noticed that the cost of labor makes anything produced in the US expensive, which is why so much crap is made in china. It's a 2 edged sword....you can't have your cake and eat it , too.
It certainly is true that a retailer has to mark up everything he sells. If you go to a local cabinet shop, you may be able to come close to the price of those kraftmaid if you don't want all the bells and whistles. You will probably get a better install job than from the smockmen, because they have to squeeze a piece out of their install contractors, as well.