It's rudimentary economic supply and demand.
They withdrew net supply such that demand could not be met. Scarcity creates value (increases prices). Too much scarcity creates shortages and economic disruption.
The Greens are also anti-Capitalists who don't bother to learn math and economics. To them, Government is a magic wizard that can instantiate anything, at any time, on demand, from nothing ... except other people's money and property.