Who are you to assume they always are? Once again, you're just dismissing the problems away.
> They took that decision voluntarily.
As if nobody in the history of the world took a deal that turned out to be bad for them. A voluntary choice does not inherently imply that the choice made them better off.
Regardless, you've completely ignored the last sentence of my original reply, but I'll try to spell it out for you. The neocolonialist objection does not boil down to, take these women's jobs away and make people in the corporation's home country do it. It is primarily a critique of the society that benefits from or depends on labor its own members consider unacceptable or beneath them. It is inherently exploitative by that society's own standards, and retaining such an economy is either unsustainable or incentivizes the perpetuation of the conditions which allow it to exploit. In other words, the US has a vested interest in making sure some people are always poor and desperate enough to do the jobs it doesn't want to do.