Prime Minister Scott Morrison and Treasurer Josh Frydenberg are privately throwing the pressure back on NSW Treasurer Dominic Perrottet to “walk the talk” on state tax reform after more than a year of publicly floating potential changes.

Mr Perrottet has said increasing or broadening the 10 per cent goods and services tax should be on the table, has backed axing stamp duty in favour of land tax, and expressed interest in overhauling payroll tax.