US has next to zero privacy protections, and unlimited investor money with zero expectations for a company to ever turn profitable. E.g. all of YCombinator's "top companies" lose hundreds of millions and billions dollars a year.
China and Russia have cheap labor and yes, zero privacy.
Edit: the same people who clamor for Russia and China-style big companies will immediately shout for government to step in if any company ever gets to the size and influence of Yandex or AliBaba.