A couple of points. First of all, Shmurah Matzah with the standard Hidurim is really that expensive to produce. I know what I’m talking about from the inside.
Second of all, there are precious few, if any, Poskim who would agree that machine Matzos produced today are more Mehudar than the hand Shmurah produced today. People are very very involved with every aspect of the machine as well, and to the degree that they are not there are more Shailos and issues with the Kshrus of the Matzah!
The whole issue of mass Shmurah Matzah production is not simple at all. If you want to gain an appreciation for it – both hand and machine – visit a factory with a Mshgiach who cares and ask some questions.