Why do you believe winner takes all outcomes are inevitable without regulation?
Anyways, if you can devise a way to regulate millions of people spread across thousands of organizations with even 10% less 'administrative burden, regulatory capture, politics' you will certainly become the most influential person of all the time, assuming you keep on delivering year after year.
That explains the likelihood of a winner-takes-most situation developing. But that doesn't equate to a winner-takes-all situation.
I can easily see the 3 largest companies in a given sector taking 90% marketshare, or more. But to imagine 1 company taking 90% marketshare? I haven't seen a credible argument for why that would generally develop outside of some specific niche.
Anyways, if you can devise a way to regulate millions of people spread across thousands of organizations with even 10% less 'administrative burden, regulatory capture, politics' you will certainly become the most influential person of all the time, assuming you keep on delivering year after year.