I don't think Apple's ability to use lasers to drill tiny holes specifically depends on the salary range of Foxconn's assembly workers, but I could be wrong.
Hate to break it to you, but laser drilled holes is something anybody can do. After all, basically all Apple manufacturing is done by sub-contractors anyway. And those manufacture for everybody.
It is like saying nobody can ship B2C like Amazon does, while ignoring the fact a very big junk of shipments is handled by the likes of DHL, and ignoring all the 3PLs Amazon is using for warehousing.
Yes anybody can have third parties do it for them, but few are willing to pay for it.
Also, most smaller players cannot afford it because of economies of scale makes the first ten thousand holes way more expensive than the ten millionth.
