> If someone doesn't have to spend $1000 on new appliances, it's not like that thousand dollars disappears from the economy.
Yes it does. Modern economic systems are built on consumerism. Saving large sums of money acts like a vacuum on currency and brings markets to a halt. Flowing money lubricates the economy.
That's basically the sum total of the most recent economic crisis, money wasn't moving, so two presidential administrations through gigantic sums of money at the economy, like spraying it down with WD-40, until it started moving again.
> Either the person spends that money on something else or sticks it in their savings account and the bank loans some of it out for someone else to spend.
The problem is that in aggregate, if nobody is spending money, it doesn't move around at all. If nobody takes out a loan, then that money just sits in the bank. Sitting money means nobody needs to manufacture anything because nobody is buying anything, which means there's no reason to employ anybody, so nobody makes money. Because times are bad, they save what they have even more and spending continues to go down.
Fairly quickly the economy goes into a death spiral, and while plenty of people may have money, there's nothing to spend it on anyway.
China is using the same economic trick that's been used time and time again, in the U.S., Japan, other places, to kickstart their economy. It's dumping money into the economy in huge works projects, mostly construction related, and letting that money slosh around. Japan did it in the 80s, but it's no longer working as well as it once did, because pretty much everything they need to build is built, and the population is shrinking so they need even less things.