I don't understand this approach. It's as if we'd never seen politics or economics in action and therefore our best guess comes from musings.
Democracy does not equal the will or the good of the people in some hermetically perfect way. The reality is that in both economics and democracy entrenched culture, institutions and interest groups gain power. They guard it and enlarge it. They quickly develop the belief that they are entitled to it.
The 'good of society' even if it could be understood objectively is not represented in the volumes of trade policy enacted into legislation after months of committees, "consultations" and such.
Political power is the oldest currency. You call innovation a euphemism used to justify things. I call these authorities euphemism.
Incidentally, I lean very left on a lot of things. I am a European. I am pro-EU and I think that the true goals of the EU, solidarity, peace and open borders are a genuinely worthy goal. What I reject is this rule-by-beaurocracy mindset enabling and encouraging letters of objection to your neighbor's lawn furniture.
In any case, it's very easy to launch accusations from your 1,000m high, drone's eye view that these people should just shave a percentage off their margin. It's not about shaving a few percentages point. It's about shaving themselves out of existence in order to allow old, decrepit and corrupt institutions another few years at the trough.