Googled "Niki Lauda and life insurance" and the first result I checked was Wikipedia:
"Lauda became a racing driver despite his family's disapproval. After starting out with a Mini, Lauda moved on into Formula Vee, as was normal in Central Europe, but rapidly moved up to drive in private Porsche and Chevron sports cars. His career seemed to be going nowhere in particular until he took out a large bank loan, secured by a life insurance policy, to buy his way into the fledgling March team as a Formula Two (F2) driver in 1971."
I know it's Wiki but I was following back then and my recollection is crrectomundo.
P.S. Confirmed midway, second paragraph:
http://www.formula1.com/teams_and_drivers/hall_of_fame/221/