This could cost developing countries £4bn a year in lost tax revenue, according to ActionAid estimates.
The International Monetary Fund estimates that the crisis will cost developing countries $1 trillion in lost growth.
This could cost developing countries £4bn in revenues, effectively wiping out the value of half the British aid budget.
This funding is being "tragically undermined" by international tax evasion and avoidance, which cost developing countries hundreds of billions of dollars every year, Griffiths said.
Backing this up is the oft-quoted claim that northern barriers cost developing countries "$100bn a year - twice as much as they receive in aid".
ActionAid has been campaigning against proposed changes to anti-tax haven rules, which they say could cost developing countries £4bn a year.
Hard-core cartel activity is estimated as having cost developing countries as much as $32 billion in 1997 - this abuse must be tackled.
Only 40 cents in every USD 100 spent on aid goes to disaster risk reduction, yet disasters have cost developing countries USD one trillion in the past two decades.
Illness and low education rates cost developing countries billions in lost productivity every year.
It costs developing countries even more.
