Sugar beet sugar and cane sugar also are subsidized to about the same extent as corn sugar. The type of sugar used by your regional bakeries, etc., depends in part on what is raised in that region.
The Corn Belt lobby, of course, favors products that would be complimentary to ethanol production.

sea salt- with the bilge-oil flavor?
No advantage one over the other.

Mayo Clinic on salt vs. sea salt: Salt
(2300 milligrams is about one teaspoon full)