Isn't the whole idea of "money" for the government to provide a "stable currency", as a store of value and means to make financial transactions? How is it a go

Isn't the whole idea of "money" for the government to provide a "stable currency", as a store of value and means to make financial transactions? How is it a good store of value when you take 2 to 3% of the value away every single year? Imagine, you're a retiree with 200K in savings and you loose 6K every single year, just to what's considered "moderate inflation"!!!??? People will tell you, you need to invest in real assets, like real estate or equities. In other words, barter, which defeats the whole purpose of using a currency in the first place. Honestly, How is it that 2% inflation is so acceptable?