European incentive programs threatened to spin out of control when solar module prices dropped - decreasing producers' costs - while the rates utilities had to pay to buy that power stayed high.
VOA: standard.2010.03.23
This would enable them to effectively sell their services to the NHS and to decide their own hours, ratesofpay and other conditions.
Breaking up national pay bargaining would be extremely complicated, and would create its own problems, particularly where you have boundaries between two ratesofpay.
Although many London-based staff receive a weighting allowance, most public sector staff are subject to the same ratesofpay whether they work in the north or the south.