Sorry it will not. Stable coins have depreciating value like you have criticized fiat. How can stablecoin help an economy? Just a digital currency and how can that be possible when people are dumping their currency for bitcoin that is not tied to any debt repayment. Moreover, countries are architect of their own misfortune and currency can't just be the messiah. Rather it is the policy of government that has devalued fiat and they know how to get out of it by thinking properly otherwise more people are already dumping and hodling bitcoin.