> Wherever the money came from, if you dump it through the window, you'll be helping a few people, but at the same time causing inflation that will hurt everyone else. On first read I thought that this was incorrect, but on pondering a bit more, I think it's sound -- the observation is that in effect you're creating new Congolese money, and you've not actually produced any value to add into the economy, you've just i…
In practice, on a national level it's unlikely any individual is going to drive up the general price level because the actual quantity of currency in circulation is driven by the banking system (which ha policies specifically designed to keep the supply and demand for money in balance). And an tourist handing out currency willy nilly is going to have a big impact on prices in a small village regardless of what currency they pay in, because there's not much choice or competition there.
In terms of theory, the basic intuition is described by the Quantity Theory of Money and the reasons why prices/wages tend to rise slower than wages is covered by (New) Keynesian economics; covering when, how and why the extra spend might lead to more growth or more inflation is pretty much the entire first year of undergrad macroeconomics (particularly with the USD added in as well; that introduces the dynamic of how a fall in the value of the Congoese Franc affects imports and exports and resulting effects on local production)