I would say that the best tools for establishing and preserving freedom are the Constitution, courts, and legislature in general.
The Constitution is a set of laws that all people within one country should follow and it is a document which guarantees their freedom and equality. Courts and other laws do the same thing as well.
Generally speaking, a "mixed" economic system can be characterized by some government involvement and private ownership of most business, since some government regulation ensures the protection of the consumers.
I don't think they were necessary justify even with everything going on at the time since it's targeted people who were suspected
