Hayek coin pegged to stable buy power, inflation/deflation adjusted, while NBT/tether pegged to USD face value. if 1HYK pegged to 1USD in 2014, perhaps today 1HYK =1.05USD accrording to FED inflation rate.
yes, you can achieve 2 conditions at the same time in impossible trinity.
Did you investigate other blockchain apps like, i dont know, ethereum or bitcoin sidechain?
Neither Bitcoin sidechain coin nor ETH has the mechanism to control coins quantity to maintain buying power.
Nu/B&C is the closest model to Hayek theory, but I guess we need modify them. If B&C succeed, issuing a kind of Hayek money is a easy mission. This will be the biggest innovation since 2009’s BTC, and hundreds of copy cats will come.