You're the professor. You choose. But it's about modern banking, not historical fluff that can't be easily backed up.
Make sure to include the part about how banks take in your deposits to "dole back out to the economy."
Okay then... Lets start with where I think you want to go.
Okay.. lets discuss deposits and Dole back out into the economy.
So lets start with asking the question.. does "saving" money mean that you are taking money "out of the economy"..
The short answer is no they don't. and that's because banks are not run like Gingrotts from Harry Potter. There is no separate Personal Vault with a pile of gold and cash in it with your name on the door.
That's not how banking works.. neither now.. or in the past when merchants used "bills of exchange" with certain trading families.
Banks don't have huge vaults of gold bars and cash. What they do have is an accounting of money. At one time it was basically a written ledger.. and now its a computer program.
So other than a reserve of cash.. its just electronic accounting.
So..when a bank makes a loan.. it simply electronically adds to the borrowers deposit account.. in reality creating "new money".
So where do deposits come in? Well banks have to clear their outgoing checks with the Federal reserve or other clearinghouse.. and to do this they are required to have reserves in reserve accounts at the Federal reserve. When Bank A loans money to a person who has an account at Bank B.. The Fed debits Bank A's reserve account and credits Bank B's account. At the end of the day.. if Bank A's account is "in the red".. then the Fed automatically loans them the money. However the Bank is required by law to clear this "overdraft" (.. They can do it buy borrowing from the Fed in the Fed funds market.. but there is an expense to that, or they can get it from buying a wholesale deposit from a broker (at an expense as well) . And that's where customer deposits come in. The best way fiscally for a bank to meet the requirement is through customer deposits. ( In addition, since 2008 and the banking crisis, there has been a limit on the amount of wholesale deposits a bank can borrow) . That's why banks try to attract customer deposits.. even paying interest on them.
So, for the general public who want's to know.. what happens to my deposit? Since there is no finite amount of money.. no bank vault with your name on it, in fact.. its largely all electronic accounting and not even cash and the deposit "balances the books" and allows banks to loan. Its easiest to say.. "it goes back out to the economy in loans".
now in general.. no one. including many if not most economists have a problem with this.
There is however a group of folks that seem to have a conniption with this laymans way of explaining it. And those are the followers or believers of Modern Money Theory.. or MMT.
The followers of Modern Money Theory have coalesced around the fact that there is no real "limit" to money production. Heck.. there isn't even a limit when it come to paper and ink and that's because all that is needed is the thought that more money is needed.. and an entry is made into the computer program. Taking this, they have come up with the idea that deficit spending doesn't matter, and some followers don't believe that even taxing is necessary. And that's because the us has control of their own currency and is the default currency of the world.
The problem is.. followers of Modern Money Theory don't understand the fatal flaw in their logic. Yes.. the money system is not finite.. its just blips on a screen really. Anytime the government needs more money it COULD simply make an entry in the computer and poof its just "made" more money to pay its bills.
The problem with Modern Money Theory is.. so what? Honestly.. so what if money is not finite.. that the government can "always pay its bills" by issuing more currency with making an entry?
That's really nothing new. The problem with Modern Money Theory is that while the government CAN do it.. there are really dire consequence if it DOES.
And that's because the whole monetary system has been and is.. based on FAITH. Simple faith that the money is actually worth something.. that if I can take this dollar or this balance on my computer screen.. make an entry and pay for food, clothing, shelter.
If there is no faith in the money.. then its worthless because it has no intrinsic value. (even gold is of limited intrinsic value)
For money to have value.. there has to be FAITH that the money has value.
If the government runs continual deficits and simply creates more money to value them.. at some point.. people will not have faith in the government and thus no faith in the currency and it becomes worthless or seriously devalued.. which has dire consequences for everyone.