Yes, I see that deflation is a bad thing.
My question is why it is considered a problem.
It should be easy to solve.
It's easy to print money. It's not so easy to get it into circulation.
Part of what causes deflation is a reduction in the
circulation of money, as people put off purchasing (because they can spend money NOW to get what they want, or they can spend money LATER and spend less to get more).
Which should I do -- buy a new refrigerator at $800, or spend $200 on repairs so that the old one will last two more years? Well, if I expect that the refrigerator prices will go up, and in two years refrigerators will cost $1500, I might as well buy it now. If I expect prices to go
down, however, and I expect to be able to buy a new refrigerator for $500, then I can actually save money by putting off the purchase.
The problem is, almost everyone will be thinking this way, and so the refrigerator company will be making very little money; it will have to either go out of business (which is bad) or lower prices even further (which contributes to further deflation). So it's a self-perpetuating cycle.
Similarly, suppose I want to expand my business, and it will cost $100,000 to do so now, or $50,000 to do so in two years. Doesn't it make more sense to put off taking out the loan? So even if the bank has money to lend, no one wants it
NOW. (And the only way the bank can continue to stay in business is by raising the interest on the loans it does make, which contributes even more to the problem of no one wanting loans.)
Now, suppose that the government prints $1000 and gives it to me. Does the fact that the government gave me $1000 change my decision to buy or not buy the refrigerator? Probably not --- instead I might as well just put it in the bank. So the effect is that there's more money, but it's not moving -- it's just sitting there in a bank (and not even being lent out).