In a world of rising petrol prices, mandating the addition of ethanol to Australian fuel makes increasing economic sense, argues a former deputy secretary of the Department of Trade, Colin Teese.How long must we wait for our politicians – Coalition and Labor alike – to learn the lesson that taking an independent public service out of the policy-making equation leads to bad policy?With their ideas rooted in ideology, party stalwarts might be good at ferreting out the wish-list of the party’s spec…