Gates' interests and Bush's not entirely congruent on immigration reform

Bill Gates backs immigration reform on Mexico trip�|�International News�|�Reuters.com:
"MEXICO CITY (Reuters) - Microsoft Chairman Bill Gates, the world's richest man, said on Tuesday the United States should reform its immigration laws and give more flexibility to higher-skilled foreign workers."

At the tail end of the story, it mentions that Gates recently told a Senate committee that the Asian scientists and engineers he employs routinely wait more than five years for a green card.

Of course they manage to work in Bush's proposal for a "temporary guest worker" program without mentioning that it has (a) nothing to do with Gates' desire to ease the way for high-skilled wotkers to enter the US and (b) alteady exists (the existing quota is perennially undersubscribed).