By Andrea Shalal and Diane Bartz WASHINGTON (Reuters) -The U.S. Treasury Department on Wednesday flagged concerns about consolidation in the $250 billion annual U.S. alcohol market and outlined reforms it said could boost competition and save consumers hundreds of millions of dollars each year. New merger and acquisition scrutiny, different tax rates and lifting regulatory burdens to new entrants in the wine, beer and spirits market would make the market fairer for new brewers and cheaper for consumers, Treasury said in a 63-page paper https://home.treasury.gov/system/files/136/Competition-Rep…