(Chang) recognises the failings of centrally planned economies, and rightly describes capitalism as "the worst economic system except for all the others".

A. Economy for Common Good (ECG) is not a planned economy and was written in 2010...

B. Churchhill was born in 1874...

as for naked short-side derivatives in the ECG system, their value would simply be assessed and scored in relation to their contribution to the common good. Which would be negative - and for all to see (transparency). So heavily taxed (in the true cost system) but always remain a free choice.