Freedom is unnecessary for Capitalism. Look at China.
I believe you'll find that many who would consider freedom to (more or less) equal capitalism have settled on definitions of all relevant terms that cause "freedom = capitalism" (for their definitions of both terms) to be a tautology. "Freedom", "capitalism", "coercion" and others will have been stretched in some places and narrowed in others, nuance and odd corners trimmed off until it all fits together, nice and neat, pleasing to the eye in its simplicity and certainty.
You have to read the article, the title is a joke (in the literal sense.)
I'd like to, but the link just sends me to Forbes' paywall. =/
I believe you just have to wait it out, you should get redirected after a few seconds. No?