The difference between both nations is tha the venezuelan administration spends all of the oil porceeds now, not saving a pence. chile, by constrast, follows its counter cyclical guidelines and even tries, through fiscal policy, to avoid an excessive appreciation of the chilean peso against the us dollar -a byproduct of the high copper price-, which could lead to some degree of dutch disease, by saving $15 billion abroad. only the interests of it are to be spent for now. hope this helps!
