While you're right, I suspect having the price of meat increase 2-5x will mean that whoever pushes for the elimination of factory farming won't be in power for long enough to "make it stick".
"If my neighbor is affected too, then they won't be able to undercut me in price later..."
Even if that scenario is very rare, it's interesting to think of how dramatically these discussions would change if we had perfect forensic knowledge for tracing the complex blame/liability.