A Ponzi scheme is an investment that is built to deceive investors. My country's fiat currency could be said to be a legalized Ponzi scheme because politicians will always make promises of how they will make the currency stronger and more valuable. One politician in my country promised to make our local currency to be equal to the USD. Many people believed him and kept their investments in the local currency. Today the currency has lost almost half of its value and the money is gradually becoming worthless.
Not the definition of a Ponzi but it is the definition of a scam.
a scam would be the master set
a ponzi scheme is a subset of it.
Whatever you country is I am sure you leaders are scamming but not via ponzi. It is a subtle difference.
By now it has become obvious that all countries are just kicking the can down the road. making all fiat worth less with bigger inflation on the picture.