That link mentions a dispute between 12 unions and 6 rail companies one of which is amongst the dozens of companies owned by Berkshire, run by Buffett. I see no mention of Buffett personally getting involved?
...more personally involved than owning a large part of the company and directly running it? How much more personally involved can you get? Otherwise corporations would be above accountability. The whole system falls apart if executives and the board (and ideally, shareholders) can't be considered personally responsible.