What would then happen if the proletariat in the 3rd-world become more conscious and start pressing their salaries up.
I don't think they have anywhere near as much bargaining power as that. For them it's either starve and have someone else take that job and be exploited, or be exploited themselves yet eat.
Same applies everywhere imo or nearly all jobs would have close to identical salaries.
They'll always be someone willing to work for low pay when someone else isn't, whether due to poverty, desperation or other issues.
I wish death on everyone who works for the Department for Work and Pensions.