An effective tax system needs to recognise the contribution that Welsh taxes - as a whole - will have in the redistribution of income across households in Wales (Footnote 2).
Mae angen i system drethi effeithiol gydnabod y cyfraniad a fydd gan drethi Cymreig - yn eu crynswth - o ran ailddosbarthu incwm ar draws aelwydydd yng Nghymru (Troednodyn 2).