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myscreenname said..
Harrow, lets assume a retiree had $1m in bank and needed $50k per year living expenses in 2020.
At 0% interest rate, retiree will be broke in 20 years.
In 2023 inflation is 7% higher than 2020 and interest rates are 5%.
Retiree now earns $50k per year in interest from savings and living expenses are $53.5K (7% higher)
In 2023 how long will it take for the retiree to be broke?
Harrow, do the maths!
I've done the maths. With 7% inflation and 5% interest, the 2023 guy runs out of money in around 18 years.
Sure, he's spending $53.5K one year, but the next years he's spending $57.2K, then $61.3K, etc. After 10 years he's spending $98.4K p.a. Every time this comes up, people seem to just look at the interest earnings and increased cost of living after just 1 year and then draw a conclusion from that, without looking at the impact of the compounding effect over time.
If you assume the same spread between inflation and interest, whether it be 7% CPI & 5% interest, or 4% CPI & 2% interest, there's not much difference between how long the money lasts in each case. Flip it around so that you are earning above CPI and you'll still see that it doesn't matter too much of it's 2% CPI and 4% interest, or 7% CPI and 9% interest. The real difference appears if the spread between inflation rates and interest rates changes.
So, the question becomes this.... do interests rates keep up with inflation (i.e. maintain the same gap between the two)? I'd figure probably not?