”The tax agency said about 20 percent of the vanished dependents were children who had been claimed as dependents by both parents after a divorce. Under the law, only one parent may claim the child as a deduction.
Most of the others probably never existed, John Szilagyi, an I.R.S. researcher, said. And some families apparently became quite greedy in creating dependents, each worth a $1,080 deduction in 1986, and $1,900 in 1987.
About 66,000 taxpayers who claimed four or more dependents in 1986 claimed none in 1987, after the Social Security identification rule went into effect. And more than 11,000 families claimed seven or more dependents in 1986, but none in 1987.”
So, big lie, you mean. -> https://en.wikipedia.org/wiki/Big_lie
In addition, nobody "makes" you get a green card.
You have to get a green card after your second work visa or go back home, that's the choice. Unlike other countries where you can work on a working visa indefinitely and never even qualify for permanent residency.