Firstly, incentivisation for low-carbon technologies must match the tax-payer subisidisation of carbon intensive energy (i.e. oil) that has existed in the preceding decades. In short, it is an uneven playing field. I will not go into why this is (An essay in itself)
Secondly, your implication of blame pointing towards development countries is symptomatic of the old adage "do as I say, not as I do". As 'leaders', where is our example to set? Or to put it differently, who can they copy in order to achieve higher levels of well-being? We are hardly in a position to criticise and should focus on our own country rather than compare with others.
Unfortunately we are far from being in a position to pat ourselves on the back (be that 25th or wherever).
Two points to finish on. Reducing energy demand and improving supply to homes leads to higher disposable income (savings). This in turn gives higher spending power (Marginal propensity to consume). The maths are clear. Secondly we have a responsibility for our children to take responsibility for our actions. We can tittle-tattle about rationale until we are under water/on our knees begging to gas dealers if you like. The planet will look after itself by the way.