Outside of a few very specific fields, I have trouble believing that a Master's degree will result in $500k+ salaries.

But if you have data, I'd love to see it.

Not true. Average programmer salary for foreigner is more like 100K, which is pretty good already

If you focus on computer vision / machine learning at least

The vast majority of these people are not pulling home $500k per year salaries, or even total comp.