A simple super tax adjustment could benefit more than one million low-paid workers. Photo: Joel Carrett/AAP PHOTOS

An "out-of-date" tax rule older than Gangnam Style will cost lower-income workers $500 million in retirement savings this year.

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That's according to the Super Members Council, adding to growing calls to lift the Low Income Super Tax Offset (LISTO) - designed to boost superannuation for some of the lowest-paid Australian workers.

Anyone earning up to $37,000 receives a refund of up to $500, which goes into building their retirement nest egg.

When it was introduced it ap

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