Slavery is forced labor. I don't see anything forced here. Salaries for unskilled labor are driven down by lack of demand for unskilled labor, and nothing can be done about that.

What can be done is adjusting employees' skills to the areas where demand is still high. Coding bootcamps are one obvious possibility, but there are others. Everyone can learn new things.

You, personally, can help these people, too. Hire an Uber (I am sure it helps many people survive; I had my share of tough times, and I'd sure could have use it as some source of income; unfortunately, it was before Uber was a thing where I live). Buy something on Etsy. Spend money locally. Etc, etc.