After returning to New Zealand he became involved in disputes within the Labour Party about economic policy. In particular he was heavily criticised by supporters of the social credit movement who wanted their views adopted as Labour Party policy. Nash was also attacked by the more radical socialists in the party who saw Nash's pragmatic economic policies as too moderate. Nash, however, was supported by both Savage and Fraser and emerged relatively unscathed. He gained the additional responsibility of implementing Labour's social security plan.