I think that abandoning MCS and FITS should be considered... [cut]
1. Encourage planners, builders etc to progress towards passivhaus standards as a minimum standard, as current UK building standards are worse now than they were in Germany 40 years ago.( Based on my observations of housing construction in Germany during my youth).
2. Penalise those who waste energy in their homes. Having access to heat and light is a privilege not a right, so should be paid for, and waste penalised. I would reverse tariff structures whereby the 1st tranche is cheap, then each tranche becomes more expensive, penalising profligacy, especially those who can now afford to waste it.
I'd go with most of that...
Perhaps, while we're waiting for the MCS/FIT system to change (read: inevitably be scrapped due to its unaffordability to those not benefiting from it), we should donate our FIT payments to the NEA, a charity dedicated to educating people on how to lift themselves out of energy poverty through energy efficiency (especially taking up free insulation) and campaigning for social tariffs and so on.
http://www.nea.org.uk/ They have a campaign where well-off pensioners can donate their unwanted Winter Fuel Payments.
If you need the FIT payments to pay for the cost of the installed kit, maybe you could keep the generating credits but donate the export credits (the profit element)? But, seeing as most of us paid for this "investment" with spare cash laying about in some mattress, do we need to recover that money?