There are several of them, actually, and we can still see the physical legacy of some of the ones that are not.
Social Security was passed in 1935 and though it is financially shaky, it has been in effect for the past 75 years.
The Securities and Exchange Commission was created to prevent another stock market crash, and is still an agency of the federal government.
The Federal Housing Authority is still providing low interest loans to people for their first house purchase, and subsidizing low rent housing for those in poverty.
The Federal Deposit Insurance Corporation provides insurance on all bank deposits up to $250,000, and restored permanent confidence in the banking system.
We also have all of the hydroelectric projects and REA projects in small local towns that still exist as public utilities.