To implement these changes would put a large administrative and financial strain on the Welsh Government to introduce a whole set of new processes that it does not currently administer.
Byddai gweithredu'r newidiadau hyn yn rhoi straen gweinyddol ac ariannol mawr ar Lywodraeth Cymru i gyflwyno cyfres gyfan o brosesau newydd nad yw'n eu gweinyddu ar hyn o bryd.