There is disagreement among experts as to what would be considered a realistic poverty rate with one considering it "an inaccurately measured and arbitrary cut off". Some contend that a higher poverty line is needed, such as a minimum of $7.40 or even $10 to $15 a day. They argue that these levels would better reflect the cost of basic needs and normal life expectancy. One estimate places the true scale of poverty much higher than the World Bank, with an estimated 4.3 billion people (59% of the world's population) living with less than $5 a day and unable to meet basic needs adequately. Philip Alston, a UN special rapporteur on extreme poverty and human rights, stated the World Bank's international poverty line of $1.90 a day is fundamentally flawed, and has allowed for "self congratulatory" triumphalism in the fight against extreme global poverty, which he asserts is "completely off track" and that nearly half of the global population, or 3.4 billion, lives on less than $5.50 a day, and this number has barely moved since 1990. Still others suggest that poverty line misleads as it measures everyone below the poverty line the same, when in reality someone living on $1.20 per day is in a different state of poverty than someone living on $0.20 per day.