Is Solar Impulse an extravagant toy, built on a whim? Nobody expects photovoltaic to move transport aircraft. Positive spill-over may concern some technical innovation, so it's no coincidence that Google, Swisscom and other big technological industries are among its sponsors. But a viable business model is not the point.
Transparency is the key, as is a strong system to support the principles for how MPs and officials deal with the outside world. Mercer's wrongdoing has also focused attention on All Party Groups. There is nothing wrong with having an All Party Parliamentary Group for Fiji, and it goes without saying that no MP should take money for setting one up.