A few months ago:

Mexico's richest chides fellow billionaires

The Associated Press
Updated: 6:08 p.m. CT March 13, 2007

MEXICO CITY - The world's third-richest man, Mexican telecom magnate Carlos Slim, poked gentle fun at the philanthropy of Bill Gates and Warren Buffett, saying businessmen can do more good by building solid companies than by "going around like Santa Claus" donating money.
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Slim showed himself as an unrepentant businessman driven by "the taste for competition." He said his own charitable foundations have $4 billion in endowments — but talked ironically about Buffet's decision to give away his fortune over the next 20 years.
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Gates, who set up the world's richest charity foundation, has said he believes "that with great wealth comes great responsibility, a responsibility to give back to society."

Buffett, chairman of Berkshire Hathaway Inc., agreed with that sentiment last year when he said he would send about $1.5 billion every year to the Bill & Melinda Gates Foundation, which has an endowment of $33 billion.
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For Slim, business is a calling and the cure for most ills.
For example, he proposed that the U.S. transfer large amounts of Medicare patients to huge hospitals that could be built in northern Mexico, where health care costs would be lower.

True to his style, Slim seldom proposes a plan he does not have a business interest in — his construction company helps finance hospital projects.

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John