Does it? $60k in a high cost of living area is a very small amount of money. In these tech chop shops they are usually working 12+ hour days doing shitty work.

The only reason it's worthwhile for the worker is the worker is supporting family and/or setting themselves up back home.

The same reason workers work in actual sweat shops.

The employees at the types of places that the parent post is referring to are often in a situation that amounts to indentured servitude. They're locked to one employer for a long period of time in one location. They have almost zero control over their situation. They're not stitching soccer balls in Vietnam, but they aren't really free either.