In any system there will be abuse. That's the price of providing help to people who need it. I don't think we are particularly bad when it comes to welfare fraud. I'd rather tolerate that then see people living in real poverty or for them to have to live with the indignity of an American style Food Stamps system.
My issue with statistics around poverty, and this discussion about Fuel Poverty in particular, is that it only looks at gross income and excludes wealth. If we want real comparisons then we should be looking at after tax income less the cost of housing provision.
As I detailed in
this post a working couple with two children and a mortgage with a household income of €130k can be significantly worse off than a retired couple who own their house with an income of €40k.