They didn't "make it on their own" anyway:
They didn’t. Their fortunes derived in varying degrees – usually big degrees – from public funding, which provided almost half of basic research funds into the 1980s, and even today supports about 60 percent of the research performed at universities.
Businesses rely on roads and seaports and airports to ship their products, the FAA and TSA and Coast Guard and Department of Transportation to safeguard them, a nationwide energy grid to power their factories, communications towers and satellites to conduct online business, the Department of Commerce to promote and safeguard global markets, the U.S. Navy to monitor shipping lanes, and FEMA to clean up after them.
Apple, the tax haven specialist, still does most of its product and research development in the United States, with US-educated engineers and computer scientists. Google’s business is based on the Internet, which started as ARPANET, the Defense Department’s Advanced Research Projects Agency computer network from the 1960s. The National Science Foundation funded the Digital Library Initiative research at Stanford University that was adopted as the Google model. Microsoft was started by our richest American, Bill Gates, whose success derived at least in part by taking the work of competitors and adapting it as his own. Same with Steve Jobs, who admitted: “We have always been shameless about stealing great ideas.”
Companies like Pfizer and Merck have relied on basic research performed at the National Institute of Health. A Congressional Budget Office study reminds us that The primary rationale for the government to play a role in basic research is that private companies perform too little such research themselves (relative to what is best for society).
Not to mention "their" fortunes are dependent on workers to do the work and consumers who spend to buy "their" products.
Interesting the author notes "the last five years." Just who was president during that time?
A puppet of said superrich.