Evidence based government programs

To what extent do you think social programs in the budget are evidence based compared to advocacy influenced?

For many years, studies like these have influenced both politics and policy, fueling national marriage-promotion efforts, like the Healthy Marriage Initiative of the U.S. Department of Health and Human Services. From 2006 to 2010, the program received $150 million annually to spend on projects like “divorce reduction” efforts and often cited the health benefits of marrying and staying married.

via NYT