I was thinking more of bacon when I wrote that, but yes, pork is more staple. It doesn't change my opinion about the balance of rights though.
As a sibling comment says, disadvantaged families could receive additional benefits to offset meat price rises.
You could subsidise welfare improvements but pushing costs up has the benefit of allowing more environmentally beneficial alternatives to break through on value for all consumers.
the answer you are suggesting has higher deadweight losses to the economy and will make the poor (and everybody else) worse off, full stop. In exchange for which you claim a hypothesized benefit to pigs which I don't believe and also don't believe you have a basis for believing, and which sits on a very shaky foundation, see Dawkins's "The Selfish Gene"
Humans' rights to luxury meats should not exceed animals' rights to a humane existence.