Even if I had to buy the wood from someone else, I took a $1 piece of wood and turned it into a $20 spoon. Wealth was just created without anyone loosing it. Wealth is infinite. Sure the amount of currency in circulation is finite, but currency isn't wealth.
> It is also important that, the more wealth you have, the easier it becomes to make more of it.
I agree--once you get to the point that you can make your wealth make more wealth for you, you've hit the point that you can scale beyond your time. Generally speaking having your wealth make more wealth requires investing your wealth, which is a good thing.
> So, indeed, the rich obtaining more of it does mean there's less for you and me.
This simply isn't true. See wooden spoon example above.
If you use the wood for the spoon, it means someone else cannot use that wood for making a ship or heating their house. You cannot go and make a million spoons to get rich without either having money to invest or breaking a few laws. And this happens because the amount of wood (or resources, in general) is not only finite but relatively scarce.
We have gone down a rabbit hole, and it sounds like you (and I too) no longer wish to dig any deeper. The point is when the rich get wealthy it doesn't demand the non-rich to get more poor.
Yes, there is. It is not limited, we can do more of it, but of course it is finite. It is also important that, the more wealth you have, the easier it becomes to make more of it. So, indeed, the rich obtaining more of it does mean there's less for you and me.