These export-processing zones provided for duty-free entry and duty-free exit for export-oriented goods and helped in the transfer of technology and skill to the developed countries.
Rather than offering free entry and exit, voluntary exchange, perfect information, competition and choice, the exchanges will simply offer more bureaucratic jobs to monitor the redistribution of tax dollars in the health system.
The prime minister's spokesman said Mr Kerry did not ask about Britain's possible future exit from the European Union but he and Mr Cameron did discuss a free-trade agreement between the US and the EU and the possibility of making progress at the next G8 summit in Northern Ireland in June.