The measures in the whole package could be extended if inflation continues to surge, Muller told private radio RMF FM.
On Friday Morawiecki highlighted a previously announced VAT tax cut on petrol.
The tax cuts are aimed at countering the impact of surging inflation in Poland, which has reached a more than two-decade high.
Poland's central bank hiked its main interest rate by 50 basis points to 2.25% on Tuesday and signalled there was more tightening to come. Data on Friday showed the consumer price index hit 8.6% in December.
(Reporting by Joanna Plucinska; Editing by Frances Kerry)
