The federal government's proposed changes to the way superannuation is taxed will soon become law, after the Greens agreed to back the reform.Under the plan, roughly 1.3 million of the nation's lowest-paid workers will get access to the low-income superannuation tax offset (LISTO), while about 90,000 ultra-wealthy Australians will have their superannuation earnings taxed at a higher rate.The move will also raise an extra $1.6 billion a year in revenue for the federal budget.IRANFLATION: Fuel shortage to drive up grocery