From the trust-busting guns which he has turned on the monopolies of the building trades (TIME, Nov. 20), Assistant Attorney General Thurman Arnold last week let go another salvo. In spite of the liberal view that unions can do no lawbreaking, Trustbuster Arnold proceeded to list five kinds of union behavior which the Department of Justice considers violations of the Sherman Antitrust Act. The five:
> Preventing the use of cheaper material, improved equipment or more efficient methods.
> Compelling the hiring of useless and unnecessary labor.
> Enforcing systems of graft and extortion.