When you own Dairy Queen and who knows how many other "bricks and mortar" business, of course you don't want a rise in the minimum wage. Like all successful capitalists, Buffet prefers that the government subsidize his workers wages through earned income tax credits -that is socialize the true costs of employment (not to mention the tax supported government infrastructure that allows his businesses to function in the first place) for Warren's companies; but continue to privatize the gains.
Business as usual. Warren is in favour of modest increases in capital gains and personal tax rates - but what does that mean when so many of the rich and powerful corporations and individuals pay next to no tax because of tax havens. It's always somebody else's ox that should get gored.