These sorts of change tend to have significant but very diffuse benefits (everybody pays X% less for $thing) but very concentrated costs (areas dependent on $industry being gutted).

I tend towards the idea that the benefits are often worth having, but that the costs shouldn't be externalised onto the workers in question, and therefore regard corporation tax being used to fund redistribution/welfare programs to be justifiable on a market basis as a pigouvian tax as well as justifiable from basic morality.