"You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete." --Buckminster Fuller
Summarizing Thomas Piketty's "Capital," an article published a year ago in the column The Economist explains says that he "... closes the book by recommending that governments step in now, by adopting a global tax on wealth, to prevent soaring inequality contributing to economic or political instability down the road ." We should strongly disagree with such recommendation by identifying the source of such "soaring inequality" and by giving a better recommendation to minimize said instability.
The main source of such inequality is the result of Robert Mundell’s win-lose “supply-side economics” existing reality of unfair markets  that should be replaced with a win-win “demand-side economics” proposal, starting for example in electricity to make Mundell's model obsolete, as suggested by Buckminster Fuller . The summary of that "demand side economics" proposal is:
Adequate electricity system restructuring is a key subsystem component of the adequate global society system restructuring needed to enter the Golden Age of the first technological revolution of what this author conjecture is a systemic civilization. From a heuristic system architecting perspective that Golden Age will be the result of the design of the value creation generated by the highly complex socio economic system that none of the subsystems by themselves is able to provide. Such value is the result of the relationships among global society subsystems.
In the paper Rethinking Electricity Restructuring, Van Doren and Taylor said in 2004 that “the poor track record of restructuring stems from systemic problems inherent in the reforms themselves. We recommend total abandonment of restructuring and a more thoroughgoing embrace of markets than contemplated in current restructuring initiatives.”
What Van Doren and Taylor failed to recognize was that systemic problems are the “wicked” problems that were identified by professors Rittel and Webber as far back as 1973. In addition, as early as 1989, professor Paquet provided two characteristics that make the traditional policy research methods inadequate to address “wicked” problems, while stating a simple rule for the selection of a framework that is satisfied, for example, by the generative restructuring proposal of the Value Added Electricity Architecture Framework.
To enable said proposal with an institutional innovation we can start to leap Capitalism from Good to Great , which is summarized as follows:
The Electric Pact of the Dominican Republic that started on January 2015 can become a great opportunity for humanity if it is reframed as a strategy of trajectory from its current strategy of terrain to go into the Great Capitalism Systemic Civilization scenario instead of the current Good Capitalism 2nd Middle Ages scenario, Corresponding to a systemic crisis of more that 40 years, being very representative for other sectors of society, this high systemic leverage opportunity should not be wasted.
Instead of the adjustments being made by governments on the supply-side subject to market failures, they are to be done on the demand-side on great markets that by fast institutional scalable learning in due time won't eventually fail . In that restructuring proposal it was recognized the "systemic problems of those reforms were originally named as “wicked” problems in the 1973 article ‘Dilemmas in a General Theory of Planning’ by HORST W. J. RITTEL Professor of the Science of Design and MELVIN M. WEBBER Professor of City Planning, of the University of California, Berkeley .”
It is those systemic problems that mutually reinforce each other for the worst, which are the source of Piketty’s discovery of the soaring inequality that society has been experimenting . The new “demand-side economics” has available increasing returns that makes possible sufficient systemic leverage to be available under healthy cooperation and competition so that a win-win environment  can be developed as described, for example, in said proposal  for the electric power industry. As the general conjecture on the Systemic Civilization has been proved , we understand that the availability of “demand-side economics” is another way to prove the emergence of its first Golden Age .
 Jim Collins, Good to Great, HaperCollins, 2001