(CNN)There are many myths about Social Security: It’s going bankrupt. It’s a Ponzi scheme. It won’t be there for today’s young people when they retire. There’s no truth in any of them. But one of the most prevalent myths these days is that the federal government is stealing from Social Security. It goes something like this: The President and/or Congress have been raiding the Social Security Old Age and Survivor’s trust fund (also known as the retirement trust fund) to pay for other federal expenses (tanks, roads, bridges, food stamps, etc.) and have never paid it back. The myth, which persists today, goes back at least 50 years and is based on a fundamental misunderstanding of Social Security’s finances.