re: SNAP: $15B spent on junk food

Reform is absolutely necessary. We will have to wait a while to actually see it.
Some of common arguments against reform have already been discussed.
You can throw in the "military spending is far worse" and the ever present "that's racist" arguments.
There is waste and bloat in just about every area of government spending and something needs to be done.
The more the "racist" tag gets thrown around inappropriately the more diminished its power becomes until the powers that be are no longer fearful of the stigma it carries.