It just means that they can't retire solely on the money they get for having money in the first place.
With 2% inflation and a 1% money market, you're losing a net of 1% per year. If you were handed a million bucks at 25 and sat on it until 65, you'd still have an inflation-adjusted value of $669k.
That's not the difference between retirement and non-retirement. It's the difference between a luxurious retirement and a less-luxurious retirement, or a retirement at 70 rather than 65.
That money will continue to deflate, and if you live for another 40 years, it becomes a mere half-million at the end. That would give you $11k a year to live on -- not great, but again, you're talking about four decades of no work. That's a lot to ask.
That's not fun, of course, but it's not supposed to be fun. "I was handed a million dollars and therefore deserve to have it exponentially accumulate value for no work or risk" is fun, but it's not a fundamental right.
If you put earn more money than you need and stick it in the bank, you can retire. Inflation means that you need a little more money, which you can get either by working longer, or using your money to improve the economy as a whole by investment. More risk means bigger rewards. Zero risk means a net loss, as punishment for keeping your money out of circulation.
The point is that exponential growth is powerful, but even exponents of multiples of 10 don't do all that much when the base rate is 1%. It's only the difference between retirement and non-retirement for a relatively small sliver.
The real problem with non-retirement is that many people can't put away anything. They live hand-to-mouth for their entire careers, with every incoming dollar accounted for. For them, inflation isn't an issue because they have $0.
Worrying about inflation is a great privilege for those who have cash and would prefer it to become more cash for free, with no effort or risk. Instead, the economy demands they take risks rather than sitting on their money -- with the goal of some of it ending up in the form of jobs for those who don't have that cash sitting around.