How exactly can workers gain more bargaining power when the system allows corporations to move production overseas in search of cheaper labor and encourages poo

How exactly can workers gain more bargaining power when the system allows corporations to move production overseas in search of cheaper labor and encourages poor migrants ( legal and illegal ) to move to wealthier nations to undercut wages? The modern world economic system makes it easy for capital to move overseas by removing barriers ( legal, national, borders ) while keeping labor bound to particular nations and regions. And in regards to the US, we allow corporations to keep money offshore untaxed while if I moved overseas to work, I have to pay taxes on my earnings. The economist along with most media has pushed the neoliberal agenda of the wealthy elite for decades while large swathes of the nation turned to the rust belt. The days of me taking anything from the economist or much of the media seriously has long passed. I consider the economist and much of the media as I do facebook, just information pollution.