This explanation may seem "counter intuitive" because it is not logical. Yes, companies have ways to fire employees and shutter mines (like many did throughout the 90s and some have started doing recently) when PM prices decline. But that doesn't change the fact that many of the necessary business expenses like fuel and such have gone up over the past 10 years. I know that some like to quote the CPI number and say that means we have low inflation, but what goes into making that number has changed over the years to exclude such items that see the highest rise in prices, like fuel and food, etc.
On top of that many countries where the mines are found are forcing their way in to mine ownership and demanding higher percentages, partially due to said countries seeing PM prices going up each year for a long time and wanting their cut so to speak (in my opinion). When prices drop these countries don't give back that percentage. A somewhat similar but not exact analogy is how counties jacked up property tax rates when the market was going up, but when prices fall back good luck trying to get those tax rates lowered anytime soon.
Most people into PMs don't have any understanding of how the mining business works. They assume that every mining company is the most perfectly run company that does not waste money in any way and always makes the right choices. But in reality a mining company is like any other company with respect to being subject to bad business calls, bad investments, poor management, etc. Thus, even when the market price is higher than the cost to produce the metal a profit is not necessarily guaranteed. And when the cost to produce an ounce of metal goes higher than market price, something will have to "give" pretty quickly. One company (I can't remember which) actually announced it will hold back several hundred thousand ounces of silver until the price goes up (I think they said they will sell it in the 3rd quarter?).
I don't see TreasurePirate how you can say fuel, labor, and equipment costs are directly tied to the price of the PMs? Maybe you can say they jack up lease rates when prices go up thinking that more money can be made off the mining companies, but everything else has no connection to whether metal prices are up or down.
Just my opinion.
Jim