That's why Americans are always very rich and their GDP is increasing every year. because they never let their money lose value every year due to inflation.
We really need to learn about effective ways to invest so our money doesn't lose value over the years.
Spending too much is not necessarily one way to help the economy go up. Americans are not sure to use all their money to invest, so we cannot say that the US economy is strong because people do not have the habit of saving much cash.
as in Switzerland, they are the country with the highest per capita saving in the world (19.03%) but it has remained a very high GDP country in recent years and their economy has also increased. very developed in the service - tourism segment.