I think you've got everything exactly backwards. A nation that has more political liberty can expect to have fewer people living in poverty, less pollution, and more scientific and technological discoverities, as compared to a nation without political liberty. For example, here's a major American city:
Here's a major city in communist China:
Admittedly that's anecdotal evidence, but it suggests that in China, where everything is carefully portioned and maintained by the government, the air quality is worse than in the USA.
On the issue of new science and technology, consider what was invented by Americans seeking personal profit: the telephone, the light bulb, the microchip, the personal computer, the assembly line, the metal detector, the transformer, large-scale electricity, the airplane, the air conditioner, the vast majority of medicines currently in use, blood transfusions, artificial insulin, online auctions, the nuclear reactor, the tractor, ... Obviously this list could go on for quite a while. By contrast, totalitarian countries with command economies, such as China and Cuba, have not invented a whole lot.
In terms of wealth, just ask yourself one thing: how many Americans currently can't afford electricity or running water? How does that compare to the percentages in China or India or other heavily regulated economies?
I'll acknowledge that the USA is not now, and never has been, perfectly dedicated to personal liberty. But it has always been vastly better than most other nations, and both Americans and other peoples have benefited as a result.