>The real reason for the difference in policy is the incentives that it creates for the meat-producers. In the US there is no incentive to keep sanitation up in the production chains because the chicken will be chlorinated anyway. This actually incentivizes sloppy (cheaper) production methods over ones that are more sanitized but more costly.

If there's no actual downsides from the chlorine, what's the issue? In many cities the municipal water source is local river that's polluted, and needs treatment to be drinkable. Part of that process might involve adding chlorine. I'm sure that all of this can be avoided if the water is sourced, at great expense, from a glacier or whatever, but nobody would suggest we should ban chlorinating water, and that allowing chlorinating water would be better because it forces the water source to be clean.