If you are not permitted to ask applicants for citizenship papers then they can receive all the benefits that a state offers such as;
Pre-natal care 100% FREE, hospital bed for birthing 100% FREE, EMERGENCY ROOM DOCTOR care 100% FREE, 12 years public schooling 100% FREE, Translator when dealing with police, fire or other state bureaucracy 100% FREE, food stamps 100% FREE, public housing 100% FREE, etc. </p>
Let's just say you have an incorrect understanding of how things work.