A poll conducted in 2008 found that 57% of Americans denied ever using a government program. But when shown a list of 21 actual programs - such as student loans, disability checks, and home-mortgage interest deduction - 94% of the deniers turned out to have benefited after all.*
Similarly, a New York Times report found that many people who opposed the federal government and its aid programs were in fact beneficiaries of government spending, while an article in The Atlantic explored the sincere love-hate relationship people have towards the government they depend on.
*The Submerged State by Suzanne Mettler