The Kennedy’s have much to answer for, but I’m glad I’m not a Kennedy:
President John F. Kennedy issued an executive order 60 years ago that broke the dam. The order did not permit federal employees to bargain over wages (these are still set by Congress), or to force workers to join a union or to strike (no state or city allowed that), but Kennedy’s directive did lead to unionization of the federal workforce. And it gave great impetus to more liberal state and local laws. Government-union membership rose tenfold in the 1960s.