You actually believe that raising the wage to a level where people don't need two or three jobs is to further repress the ones at the bottom socioeconomic ladder?

Who are these people who work three minimum wage jobs? They don't exist, what percent of people do you think have 3 minimum wage jobs?
My belief in this is backed up by both Math and the entire history of the policy. If you raise the cost of labor then employers always have to cut the number of jobs, this obviously harms those who are at the bottom or marginal the most. Historically that has meant that every time this policy is put in that Black people lose their jobs the most. When it was first implemented that was considered a benefit by the racists who implemented it. Every time they hike the minimum wage black people lose their jobs the most, by today's standards that is 100% a racist policy. How can a policy that harms black people the most be anything but racist?

So why don't you just go get a minimum wage job if you think you could get by on minimum wage? If you are willing to make that sacrifice why not just earn minimum wage now?

How would putting the poorest and most needy people out of work, making it impossible for young people and older people to find work make the world more just?
Yes, kids and the elderly shouldn't work unless they really want to, not out of necessity.

Except when the minimum wage is hiked then they can't even find jobs if they want to, it's very harmful for kids long term if they don't get part time jobs in the summer in high school. This of course harms black kids the most, making it racist. Go look up the teenage black unemployment rate during Obama, that's the result of leftist policies. A lot of people like working menial jobs just to keep busy, they get screwed by these minimum wage hikes.
It's not just the low income black people who you harm with your racist minimum wage policies, you screw everyone by devaluing the value of a dollar and causing price inflation and causing businesses to close.
If automation makes jobs go away then why are there more jobs than ever? That's another pipe dream, automation leads to more demand for labor. Your iPhone is handmade because it is cheaper to pay Chinese slaves to screw them together than to build an automated production line and then change it whenever the product changes.
And that's another thing that we see happen whenever you raise the minimum wage here, more things will just be offshored to China or other places. Already you can go to a drive through window and have someone in another country take your order.
Why would you want to screw Americans while the Chinese actually use slave labor, doesn't artificially raising the minimum wage just screw everyone here?
Why not demand that Chinese workers get $15 an hour?
This is not really an opinion or belief issue, they have tried the $15 minimum wage in several places already, they have studied the results. It puts people out of work and does not benefit anyone. Except China and India.

What makes you think that a job that can be done by a brain dead teenager or elderly person actually generates more than $15 an hour of profit?