Yn ôl y Gweinidog Cyllid, ni ellir dadlau yn erbyn yr achos dros godi treth ffawdelw ar yr elw gormodol a wneir gan gwmnïau ynni mawr, gan ddefnyddio’r arian a godir i gefnogi aelwydydd sy'n agored i niwed.
The case for a windfall tax on the excessive profits made by big energy companies, with money raised to be spent on supporting vulnerable households, has been described as “irrefutable” by the Finance Minister.