Here's another good article regarding this Moral Government Theology heresy which is popular amongst some today:
The False God and Gospel of Moral Government Theology - Christian Research Institute
Notice that the attempt of these sorts of people (Calvinist haters) is to reduce God to the level of a man in terms of his omniscience and omnipotence. The theology of those who hate Calvinism invariably seeks to reduce God to the level of a man..it is a very anthropomorphic (man-centered) view of salvation versus a theocentric (God-centered) view of salvation. Man's will trumps God's will in their twisted theology.
In the Moral Government Theology view, God could even change his mind about man's salvation and just wipe mankind off the face of the earth. They may contest that view, but if God has the power of contrary choice, he can act out of accordance with his nature and decide to do that..in fact in their view, God could even become the equivalent of Satan.
Power of contrary choice means that mankind, and God, can make decisions that are contrary to their nature. It is essentially a Pelagian view, which was long declared a heresy by the Church.