I can't tell what the intended antecedent is of the word "their" in your last sentence. Grammatically, the only possible antecedent is "the evangelicals," mentioned in the previous sentence. Yes, it certainly would be scary to have their brand of morality imposed on the nation, though so far they have only been able to do that locally and in small measures. But the set-up of your post, and in particular the thread title, suggest that you meant to refer to Mormons. To that, I would say that, while the prospect is, in theory, just as scary, its chances of coming into effect are even smaller. It is certainly not the sort of thing that the president is empowered to do.
Romney's salary as president would be chicken feed compared to his income from business and investments. As for the idea that he would be appointing thousands of Mormons to government positions, I would dismiss that as mere silliness if it did not carry a rather ugly reminiscence of the speculations from the right on what would happen if a Roman Catholic (John Kennedy) became president.
It is one of the more backward and idiotic characteristics of our political life.