They're saying if that growth occured over 60 years then you've just kept up with inflation. Might as well have just put it in a standard savings account and NOT get capital gains tax. *Well, maybe a standard money market account or bond.
Bonds also incur capital gains tax) The point of the capital gains taxes/inflation is specifically to incentivize people spending money over saving (if too many people saved money the economy would contract). It's not a perfect tool, but it works somewhat.
Wait, wouldn't you get taxed capital gains on a standard savings account? I'm genuinely curious even though right now saving accounts are not saving anything at all.
The (now gray) comment talks about being double taxed. That is, taxed twice for the same money.
If I invest $100 (post-tax money) and sell the investment at $1000, I do not pay taxes on that $100. There is no double taxing. I do pay taxes on the $900 gain.
The double taxation that some people talk about is actually corporate profits being taxed, and then that money being further taxed as capital gains / dividends - but I don't think that 's a fair criticism either.
The problem is the gain may exist in nominal terms only. It’s possible to make a 100% nominal gain, which will be taxed, even if in inflation adjusted terms you lost 90% of the actual value in the process.