What is the ruling on delaying the making up of Ramadan fasts for several years due to illness and inability to feed the poor, and is it obligatory to make them up now, given the ability to work?

Whoever is unable to fast due to an illness from which recovery is not expected, a fidyah (expiatory payment) becomes obligatory upon him, which is to feed one poor person for each day he misses. If he is unable to pay it, it remains a debt upon him until he becomes able.