Flip that around though; if there's no financial incentive to take on the additional training required for a skilled position over an unskilled position, then why would anyone do it? If I need to devote extra time and effort to learn the skills needed to operate a forklift rather than mop the floor, I would reasonably expect an increase in salary to do so. Arbitrarily setting the wage floor higher for the absolute minimum salary without a corresponding increase in my pay devalues the additional experience I've worked to achieve.
Agreed. I addressed that in the comment I linked earlier.
"Lifting everyone up the income ladder" is a meaningless phrase; we could set everyone's salary to $1,000,000 tomorrow, and they've moved up the income ladder. What matters is purchasing power, and that's negatively impacted by the enormous disparity in wealth between the extremely wealthy and the poor, not the poor and the slightly less poor. The minimum wage attempts to tackle income inequality from one end while completely ignoring the concentration of wealth in the upper 0.01%, and you're not going to fix the problem that way.
Here I disagree. How exactly are the monetarily wealthy taking anything away from anybody?
Do the wealthy have garages full of 1,000 cars? Or do they have a couple of very expensive overpriced cars as status symbols, but which use about the same amount of raw materials as a Corolla?
Do the wealthy eat 1,000 meals at a sitting, or do they pay for massively overpriced meals to eat with other snooty rich people and talk about how great they are?
Or is it that old red herring about the wealthy and their gold plated yachts? If the wealthy couldn't afford yachts, would a bunch of people own 1/1,000th of a yacht? (If so, I call dibs on the life preserver.)
Until we invent the Star Trek replicator, this is still an economy based on scarcity. Until we're in that utopian post-scarcity economy, not everyone can have everything. What's making things worse right now is that it's no longer about US scarcity, it's global scarcity. The US has been sitting on top of the heap for a long time, but now the rest of the world wants to consume too. They aren't going to sit around and let us consume all of the goods this world creates.
So unless you think that the CONSUMER GOODS purchasing power of hundreds of millions of Americans is less than the purchasing power of a small number of wealthy people, increased wages won't change that. Keep in mind that this is about CONSUMER GOODS. Most of the money the wealthy have isn't used to purchase consumer goods, it's used to purchase ownership of companies. That's it's own problem, but mostly unrelated to the day-to-day American lifestyle.