Prime Minister Anthony Albanese's decision to halve fuel excise could force the Reserve Bank into a third consecutive interest rate rise in May, according to economists who warn the temporary relief may create long-term pain for mortgage holders.The analysis suggests the 26.3 cents per litre cut risks adding inflationary pressure just as the RBA was hoping to see price growth stabilize.Mate, this is classic Australian politics — deliver short-term relief that voters can see at the petrol pump, then blame the independent Reserve Bank when mortgage rates go up three months later.The inflation problemCutting fuel excise reduces prices, which sounds deflationary. But it's more complicated.Lower fuel costs mean more disposable income for households. That extra $40-50 per month doesn't disappear — it gets spent on other goods and services, boosting demand.Meanwhile, fuel supply constraints haven't changed. Australia still imports over 90% of refined fuel from Asia, and global refinery capacity remains tight. Cutting excise doesn't increase supply — it just subsidizes consumption.More demand, same supply = inflationary pressure in other parts of the economy.Treasury Secretary Steven Kennedy reportedly warned Cabinet that the excise cut could add 0.3-0.4 percentage points to inflation over the next two quarters.That might not sound like much, but the RBA is trying to engineer a soft landing where inflation gradually returns to the 2-3% target band without triggering a recession. Any upward pressure complicates that task.RBA caught in the middleReserve Bank Governor Michele Bullock has repeatedly said the Bank will do "whatever it takes" to keep inflation expectations anchored. That's central banker speak for: if inflation stays high, we'll keep raising rates even if it hurts.The RBA has already hiked rates twice in 2026 — in February and March — bringing the cash rate to 4.85%. Markets had been pricing in a pause, possibly even a cut later this year if inflation continued to fall.Now economists are revising forecasts. Westpac, , and have all flagged a third rate rise in May as more likely following the fuel excise cut.If the RBA hikes again, the cash rate hits — the highest since 2008. Variable mortgage rates would push past for many borrowers.Here's the brutal math: cutting fuel excise saves the average household roughly if they drive a typical amount.A costs the average mortgage holder about on a $600,000 loan — more if the loan is bigger.So households save at the pump, then lose more on their mortgage. Net result: worse off.And that's assuming only rate rise. If the RBA feels compelled to hike twice more to control inflation, mortgage holders are looking at .Lower-income households without mortgages benefit from fuel relief. But middle-class mortgage holders — the political swing voters is trying to court — end up paying more overall.This is a political decision, not an economic one. knows an election is coming (likely late 2026 or early 2027), and voters are furious about cost-of-living pressures.Cutting fuel excise delivers visible, immediate relief. Voters see cheaper petrol . The higher mortgage rate comes , and the government can blame the Reserve Bank for that.It's the same playbook used during the GFC — cash handouts to boost consumer spending, then surprise when inflation spiked and the RBA had to respond.Economists call it — when the government boosts demand while the central bank is trying to restrain it. The two policies work against each other, creating economic instability. has been here before. In 2008, 's stimulus packages flooded the economy with cash while the RBA was trying to control inflation. The result: confusion, volatility, and higher interest rates than necessary.In 2022, the government cut fuel excise by 22.1 cents per litre as a pandemic relief measure. The RBA explicitly cited that decision as one factor complicating inflation control.Now is doing the same thing — cutting excise while the RBA battles inflation.The frustrating part: everyone knows this doesn't work. Treasury knows it. The RBA knows it. Economists have been saying it for decades.But politically, it works. Voters like cheaper petrol now and blame the central bank for higher rates later. So governments keep doing it.If the government wants to help households with cost-of-living pressure, is better than broad excise cuts.Increase and to help low-income households who are genuinely struggling. They spend money on necessities, not discretionary goods, so inflationary impact is lower.Provide in cities where it's viable — , , . That reduces fuel demand instead of subsidizing it.Invest in — domestic refining capacity, strategic fuel reserves, diversified supply chains. That addresses the root cause rather than treating symptoms.But those solutions are harder to explain in a 30-second TV ad. is simple. is not.While argues over whether fuel excise cuts will trigger rate rises, Pacific Island nations face the same fuel crisis with for relief., , — none can afford to cut fuel taxes. They need that revenue for basic government services. Their central banks can't raise rates to control inflation because they're pegged to major currencies or lack independent monetary policy.So Pacific Islanders just pay higher prices with no relief, while their economies slow and poverty increases.If wants to be a genuine Pacific partner, offer fuel subsidies to island nations facing the same global crisis. is already doing this in and — why isn't ?The RBA will probably hike in May. Governor has been clear that inflation control is the priority, even if it means short-term economic pain. will blame the RBA for being and The opposition will blame for reckless spending. Both will be right.Mortgage holders will pay more. Renters won't benefit much from fuel relief because their housing costs are rising faster than fuel costs are falling.And will have learned nothing, because in two years another government will do the same thing for the same political reasons.Mate, when short-term politics overrides sound economics, everyone loses — except the politicians who get to blame someone else for the consequences.