Cheaper gas will drive up demand, which increases inflation. It will also decrease government revenues.
That’s why interest rates are being increased; to reduce demand. An increase in taxes would have a similar effect.
Demand for what? The high cost of fuel is one of the biggest components of the inflation we are experiencing. Other than money itself, I fail to see how something becoming cheaper is inflationary.
It will decrease government revenues because it charges GST on inflation, They even charge GST on the carbon tax.