Meh, it doesn't help much. Many of the gold mines are in countries that won't get those techs for a long while, and the output bonuses aren't huge anyway - besides, they continue to rise in a manner completely unrelated to the rest of the simulation. The problem is a pretty fundamental design flaw which can't realistically be scripted round.
Right, I get that its unrelated to the situation. But I was thinking as a method to ease currency shortages in general.
I mean, if you could somehow measure the total money in the game's economy and then back figure what an appropriate amount should actually be in 1920, you hypothetically put a band-aid on the situation.