greed the problem for miners

I grabbed this graph from somewhere recently, can't remember where. The scary thing in it is it shows how world gold mining costs on average rose from $500 to $1000 in just 6 years. This is what is killing the gold industry, not shadowy bankers manipulating the gold price. Why is inflation so high in this industry?:

- not due to union-negotiated pay increases; they would be far smaller

must be down to
-workers on contract shifting jobs on basis of higher pay, rapidly raising the wage benchmark
-increases in government taxes
-increases in component costs from suppliers because they can (trucks, tires, plant etc)