Also not true. On the contrary, the opposite is true. During international student orientation, we were told that by working here, we would be contributing to Social Security, but because of visa rules, unless we eventually end up with a green card or citizenship, we'd never be able to stay here long enough to reap the benefits of Social Security. So, in a way, we're actually contributing to Social Security to benefit American citizens.

Don't be ignorant. F visas are what most foreign students are given to enter this country as students.

I came into the US education system starting from undergrad to grad school as a foreign student (F and H visas), and I have NEVER heard of anything this stupid. Every employer that hired me during this process paid for all required taxes, even the university themselves when I worked on campus with my F visa.