Companies routinely build corporate relationships with overseas manufacturers to create product and lower manufacturing costs. It could be postulated that out of all of the products created, North Pole manufacturing actually takes up a LARGER than expected percentage of overall production, done almost completely in secret. All involved parties have signed the appropriate NDAs, which is why you hear almost nothing of this until the Holiday season when North Pole shipping lanes become extremely active, moving product to various distributors throughout the world. This information is almost completely obliterated in obscurity, as any individual who might see a legitimate "sleigh run" would be sure to attribute such a sighting to decorations or an over-active imagination.
Of course, Santa's cheap labor, uncontested natural resources, and leveraging of advanced technology (a sleigh with the speed to travel to millions of homes in one night without turning the passenger into a pancake?) gives vendors unrivaled access to fast, cheap manufacturing. And Santa's payment? He gets a fat cut of his choice of merchandise, based on letters coming into the North Pole. (Obviously, there are more requests for Xbox game systems for Christmas than hydraulic pump filters.)
Lastly, Santa knows the incredible value of "playing nice". Santa knows that companies need to sell product to survive, thrive, and benefit the world economies. It's not his intent to give every child everything they could possibly want, because to make their Christmas that amazing, the loss of income (where parents normally go out and BUY those gifts) might make someone else's Christmas not so nice.
If I had to guess (and I am obviously guessing), I would say the big guy in the red suit is more concerned with everyone getting along (as much as possible) than the accumulation of stuff. As long as enough people in leadership of the corporate world remember that, Santa and the big C's will have many years of peaceful, lawsuit-free cooperation to come.