Historically, a bill of attainder was an act that condemned a group to death without a trial. Bills of attainder are prohibited by the U.S. Constitution. There are those who say the Federal income tax is also unconstitutional but they have not been so successful and a 90% rate has been imposed on the highest marginal tax rate in the past. I am not in favor of it. Is someone suggesting we bring it back to 90%? I don't see that anywhere.