Exactly. These people stole from the American taxpayer. They should be prosecuted (I know they won’t but a girl can dream.)
Obama giveth and Obama taketh away , with interest
There are some income-change cases that aren't so clear cut. For example: a relative loses her job and moves in for six months. She pays half the utilities but no rent. Has your family unit income changed? It could because of imputed rent payments, according to the IRS.
How about if your 21 year-old son moves back in, pays no rent or utilities, works occasionally and goes to school and has school health insurance? If you do or can claim him as a dependent then yes, your income has changed due to his wages.