Nancy Altman, the President of Social Security Works and a past candidate for nomination to become Commissioner of Social Security, has written a piece for Common Dreams arguing for an end to the marriage penalty which terminates Disabled Adult Child (DAC) benefits for recipients who marry. I've been arguing for decades that the DAC marriage penalty is indefensible and should be abolished. Altman is arguing that President Biden should just order an end to the DAC marriage penalty because of the passage of the Religious Freedom Restoration Act which prohibits application of any federal law that substantially burdens religious freedom. The argument is that one's religion may demand marriage therefore making application of the marriage penalty illegal. Altman says that the Disability Rights Education and Defense Fund is trying to convince Social Security to adopt this view.
My opinion is that this is a strained interpretation of the law that is unlikely to get anywhere. If nothing else, remember that marriage is both a civil and a religious institution but you can have one without the other. Many people choose civil ceremonies but it's possible to have the opposite, a religious wedding without obtaining a marriage license which leaves you without the legal rights and penalties that go along with marriage but with religious sanction for your marriage.