they've made contributions to the society out of the profit from the people's money invested on bitcoin
am not clear about what you meant by the statement "out of the profit from the people's money, to me this is a kind of statement that could be termed as extortion which is wrong, why use people's money in the context from the first place, i think it would have been best said that El-Savador contributions to the society is on the basis of the revenues generated, if you make use of your money to buy a product, would you later refer the money in the hand of the seller as your money again after you've bought the product and left? while the funds in disposition of El-Savador could as well be referred to as government funds, which could have been from different sources such as IGR and the likes.
Taxation is levied over each and everything and this is done just to fund essential services. It can be infrastructure development, industrial development, creating job opportunities attracting investments, etc. Where does this tax money comes from, common man to the elite, industrialists, entrepreneurs, etc. In the past taxation money were used to making the lower class of people grow. If the government doesn't have tax money, what'll be its source of money. Just on that contrast I've mentioned it as People's money. I might be wrong, but on this basis I've mentioned it People's money.