That's a point I was not really fully aware of so thanks for mentioning.
Your article reminded me of a Canadian woman I met In Bulgaria. Her family originated from Norway and she had done extensive research covering some 150 years She was intrigued about why every ten years or so, the patriarch would establish a church, and then he'd upped sticks and move and do it all over away at another region of the country. . It turned out he could get land free, and then after a period of time, was able to sell it, and then, move on to obtain for free, more newly occupied territory of the indigenous people.
As you say, the notion that America is wealthy simply due to the entrepreneurial skills and 'pioneer' spirit of the 'settlers', is a colossal lie, resting as it does on so many omissions that were in fact, crucial to its growth and power base. .