Is it permissible for a person to reduce their declared income in official documents to benefit from government assistance, knowing that their real income is insufficient to cover their basic expenses and exorbitant medical bills, and that this manipulation is the only way to avoid accumulating debt?

It is obligatory for a Muslim to adhere to the conditions for eligibility for aid, and it is not permissible for him to cheat and lie to take what he is not entitled to. Lying is forbidden except out of necessity, which is when a person reaches a point where, if they do not consume what is forbidden, they would perish or be close to perishing.