there's no difference. If your skillset is sought after, you get more money (by exercising your market demand).
The fact that there are many poorly paid people is not a problem of the companies paying them poorly, but of society not creating equal opportunities for those people (e.g., for education) to skill up.
I think everyone working fulltime should have a liveable wage.
A "liveable wage", whatever that is, isn't a workable solution for a lot of businesses, simply because the actual value of their work may be lower than the liveable wage. Now instead of getting some money for food to eat or a place to stay, they now get nothing because it just isn't viable to pay the liveable wage for the value they supply.
"simply because the actual value of their work may be lower than the liveable wage."
That is not a job then and the entity assigning such tasks is not a company. A company has a responsibility to offer its workers certain benefits in return for having access to the legal and social frames that are allowing it to operate.
You're assuming an unhealthy society, which unfortunately matches the US, but also many other so-called well-off countries: social protection diminished or outright removed combined with job uncertainty and social inequality.
Having one or two Ubers allows you merely to pretend longer that the situation's not dire. The political turn to the right in Europe right now and the election results in the US can be at least partly explained by the fact that people are sick of it.
What about the franchise owner? An article was posted here a few weeks back saying the average yearly take home pay of a 7-11 owner was less than $40K a year and he was working 60+ hours per week.
Then the next argument is usually if they can’t pay a livable wage and be profitable that they shouldn’t be in business. Which is really a great argument on a site where many people work for money losing tech companies who are only in business because of VC funding.