I attended a talk by the chief economist at AIG last month and he said the same thing... this is the "new normal" and that interest rates will remain low, at least relatively speaking, for decades to come. Folks have been saying that the post-WWII economy was exceptional for decades, and the exception rarely becomes the rule.
Focus on interest rate alone, at your peril. Inflation also factors in.
If loans stay the same price, but the price of the goods goes up... same Net effect on your bottom-line.
To counter that, wages must rise to match prices. That is not happening.
Growth in most companies is not "trickling down" to borrow a phrase, not trying to make a political statement. Most of it is going to pay for increased COGS, a vicious cycle. The rest is siphoned off to cover executive compensation.
Most of the places I've worked for since 2001 have had either outright pay freezes (you're losing money, since your personal costs are rising with inflation), or have wage increases that barely meet inflation (you're not getting ahead, but at least you have a job), and manage their cash flow by rounds of layoffs.
That's a decade of zero return other than maintaining personal cash flow for the staff of all of those companies, which is telling.
The interest rate games are a symptom. You can't make new loans to people who aren't earning more this year than they did last year, no matter how cheap you make the loan.
People underwater in housing, for example, are ecstatic when housing prices rise. My thought when I see that is the opposite, because I know wages did not increase to counter that. So something else must be driving that increase, and usually it's devaluation of the currency, today.
At the core, what America has always exported more than anything else, is optimism. With Americans un-optimistic, the world financial system wonders "WTF?". Americans generally are optimistic still, but they're not dreaming big. There's more people holding on to old airplanes hoping (optimistically) that they won't take a bath on selling them, than say... trying hard to "step up" to the next bigger/faster/fancier model. Same with housing, cars, etc.
The younger generations are mirroring this by not being very materialistic at all. They've not seen a world where some hard work could triple one's personal income in a single job interview. They go for the sure-thing, not the Moon, if you catch my drift there.