Because since the 1980's, the US government (as well as other western governments) have been dismantling the ability and protections for worker unionization. Thatcher, Reagan, and Mulroney were all notable for being anti-labor.
Any excuse about anti-labor policies has to account for why cafeteria workers at Facebook managed to unionize in 2017 while tech workers there just sat on their ass. The Wagner Act is still law and is remains a powerful tool for those who can be bothered to use it.
idlewords|3 years ago