i don't see what your point could possibly be. most people will not find it cheaper to be vegan without significant changes to both their own lifestyle and systemic change. the oxford paper completely ignores anyone who isn't
The paper is discussing the cost of the diet, not the safety net programs that are built around the american diet.
A paper that analyses the consumer choices and systemic hurtles to eating a vegan diet it would be a different paper, and it would be making a different point than this one.
so the headline that is used on the site, and the excerpt used to create the link in this thread both need some heavy caveats. without proper context, both the claims made by them are actually false.