The facts are these: a beef company wants to test 100% of its cattle for mad cow so that it can sell to the very picky Japanese market. It wants to pay for the tests itself.
The Department of Agriculture, however, which controls testing (but really was given that function in order to make sure things get properly tested when they should be) has told them that they can’t do it, saying that it’s not “scientifically valid.”
Whether or not that’s even true (sure, 100% testing isn’t 100% safety, but it’s not a crazy standard), it’s pretty obvious that they are doing the bidding of the rest of the beef industry, which is scared that if this company offers beef tested with the method will increase demand for other companies to do the same. Instead they are apparently acting exactly like a monopoly, even getting the U.S. government to HELP them in enforcing their will on unwilling competitors, so that they can blackmail Japan into opening its markets to beef not tested in the ways that the Japanese would like.
This is what we get when we have regulartory agencies basically run by lobbyists and sometimes even staffed by ex-lobbyists.