Not that I agree with the profitless system advocated in the article, but ntdz's assertion that capitalist countries are the most successful is misleading, at best.
There are no purely capitalist countries. They're all "mixed economies" to some degree or another, having socialist, feudalist, and capitalist elements combined, and vary as to effectiveness of equitability efforts. Controlled capitalism, in other words.
And, no matter how it's defined, any society where feudalist and capitalist interests grow faster than GDP is exploitative of those whose share is shrinking. No matter where that society stands in terms of relative wealth, the eventual results are a third world distribution of wealth, with feudalism masquerading as capitalism.
Various societies have developed mechanisms to prevent that process, the most successful being collective bargaining, graduated income taxes and inheritance taxes, which the financial elite will always oppose and seek to subvert. The degree of success in such efforts defines the long term prospects for economic justice in any society, and, increasingly, in the whole planet's global economy.
edit-sp.