It used to be true, but now you are taxed out of success, and any other gains you save will simply evaporate with unchecked inflation and money printing by Congress. There needs to be a "Hard Stop" on inflation: The federal government's checks bounce if there is no money in the account.
... and somehow, there has been a successful miseducation campaign on the internet that "corporations raising prices causes inflation" which highlights how many people do not understand how fiat currency even works. (Even on HN, you'll see responses like this).
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