Warren E. Buffett is eager to make one point clear about Berkshire Hathaway, the conglomerate he controls: It is a good corporate American citizen.In announcing Berkshire’s nearly $90 billion profit for 2021 on Saturday, the billionaire stressed in his annual letter to shareholders the outsize role that the company — whose businesses run from the BNSF railroad to Geico insurance to See’s Candies — plays in the United States economy.It is the latest effort by Mr. Buffett to wrap himself and his $713 billion company in the flag as it continues to be one of America’s most successful businesses. Last year proved to be good for Berkshire, with the company reporting $89.8 billion in earnings, more than double what it earned in 2020.The earnings growth traces the rise in the broader economy, as the United States and other countries rebound from the depths of the pandemic.Much of Berkshire’s results …
