Even besides that early governmental founding. Companies aren't created nor exist in a vacuum.
Tax payer's money payed for most of the infrastructures, research and education those companies requires to operate.
How can you run a company like Google or any other without educated employees, roads, internet, etc.
Entrepreneurs love to think they built themselves alone, but they are just a product of the society they lives in.
Now as a society you can choose to either socialize or privatise your infrastructures, but you'll have to pay for them either way.
Money isn't enough to make a search engine; Baidu for instance has the Chinese government behind it but still produces worse results even for Chinese language searches than Google. Bing's had quite a lot of funding from Microsoft put into it.