Klaus noted that ideological environmentalism appeals to the same sort of people who have always been attracted to collectivist ideas. He warned that environmentalism at its worst is just the latest dogma to claim that a looming "crisis" requires people to sacrifice their prosperity and their freedoms for the greater good. Let me quote Klaus at length.
"Future dangers will not come from the same source. The ideology will be different. Its essence will, nevertheless, be identical—the attractive, pathetic, at first sight noble idea that transcends the individual in the name of the common good, and the enormous self-confidence on the side of its proponents about their right to sacrifice man and his freedom in order to make this idea reality," warned Klaus. "What I have in mind [is], of course, environmentalism and its currently strongest version, climate alarmism."
Klaus added, "What I see in Europe (and in the U.S. and other countries as well) is a powerful combination of irresponsibility, of wishful thinking, of implicit believing in some form of Malthusianism, of cynical approach of those who themselves are sufficiently well-off, together with the strong belief in the possibility of changing the economic nature of things through a radical political project."
As John Locke Foundation economist Roy Cordato explained: "A higher tax today means lower production and output of goods and services tomorrow, making future generations materially worse off. In setting a carbon tax you must show that future generations would value the problems solved by reduced global warming more than they would value the goods and services that were foregone." He argued it's not possible to know the preferences of future generations, but providing them with more wealth and better technologies will give them more options to express whatever preferences they have.