If you pay in gold and silver coins, the price for a service can be left unchanged over time and space.

For example, a 2-hourly rate could be set at the Australian dollar (AUD) exchange rate* as at the date of acceptance of the fee of one 1/4 oz 99.99% gold coin and one 1 oz 99.9% silver coin, plus GST, with a 10% discount given if payment is made in gold and silver coin. 

Where fees are based on gold and silver coin, there is no need to ever increase fee rates, no matter where in the world we are based, or how many years go pass. 

* Using prices for 1/4oz 99.99% Perth Mint Kangaroo Minted Gold Coin or equivalent, available from abcbullion.com.au/store/gold/perth-mint-gold; and the 1oz 99.9% Perth Mint Koala Minted Silver Coin or equivalent, available from abcbullion.com.au/store/silver/perth-mint-silver.