The purpose of the Patriot Act is to deter and punish:

The USA PATRIOT Act was enacted in 2001 to help deter and punish terrorist acts in the United States and around the world, and to enhance law enforcement investigatory tools. It requires financial institutions to establish anti-money laundering programs and procedures to help prevent terrorist financing.

“The purpose of the USA PATRIOT Act is to deter and punish terrorist acts in the United States and around the world, to enhance law enforcement investigatory tools, and to address money laundering and terrorist financing.”

— USA PATRIOT Act, Public Law 107-56