You don't think pay should be commensurate with responsibility?
That would be nice, but that ship sailed a long time ago, otherwise investment bankers and FAANG software bro’s wouldn’t be making as much as surgeons or 10x as much as teachers.
But as long as we enforce that hierarchy on poor people, right?
Ultimately, I think it has to be some combination of responsibilities, rarity of the skill required to do the specific job, and tenure.
(overlaid with a modest layer of worker protections and the ability to do some form of collective bargaining in certain sectors)
...while still understanding realistic aspect of human nature that causes people to want to be viewed as "higher" in the social hierarchy.
I think both extremes have been shown to not have a long shelf-life.
Having a bunch of poor people line up in front of the plant and having the boss come out and pick the 20 guys he wants to allow to work that day while everyone else heads home didn't prove to be a very good model, you eventually end up discontent and worker uprisings.
Having high levels of guaranteed social equity and social security also comes with pitfalls that need to be accounted for. Leader of the Danish Moderate party (and former Danish PM) Lars Rasmussen said, in a speech he gave at Harvard, that his party was seeking certain reforms specifically because in a nation when so many things are guaranteed, it can be difficult to incentivize work/sacrifice and encourage personal progress in a career field.
It doesn't have to be as extreme as the common trope of "well everyone will just sit at home on welfare". I think the "comfort gap" between not working at all, and working, is still large enough to incentive the latter.
I think was Rasmussen was suggesting there is that in a (hypothetical) environment where, let's say, the worst software developer makes $65k, the best one makes $85k, and the department head makes $105k...combined with a high level of social security and taxation, there's not a huge incentive to want to advance for a lot of people. So you run the risk of having, what would be, your best people (who'd otherwise be incentivized by more money and perhaps innovate or develop something great) becoming complacent with "phoning it in" and doing the minimum if there's not going to be a massive fiscal benefit and/or "perceived elevated status" to advancing.