…globalized corporate trade is conducted to increase the profits of large corporate entities. The result is the exact opposite, in many cases, of trickle down. Due to trade agreements that allow corporations to place factories in the lowest cost country, creating near slave-labor conditions - as BuzzFlash at Truthout has shown - for workers who, for example, make almost all American high-tech products overseas.
This does not trickle down jobs to Americans; it exports American jobs and devalues the compensation and benefits of US jobs that remain. Furthermore, in terms of NAFTA and Mexico, it dumps subsidized American products - particularly agricultural - south of the border and renders many small farmers in Mexico and Central America unable to compete. This is just one of the factors that results in increased migration to the US: the need to survive.