I don't what you're talking about. Portugal is a developed country that has been one of the most stable nations in the world, it's human quality life index rating was 19th.
The Portuguese economy is largely reliant on raw resource exploitation and agriculture. Its industrial capacity and service sector are underdeveloped and it has been repeatedly censured by the EC for its structural problems. It simply does not compare to the economies of the UK, of France or Germany.
Italy itself is also a rich nation that has the world's 7th largest nominal GDP, regardless of region.
The economic data of southern Italy compares to third-world nations; governmental authority is lapsing in favor of mafiose structures; unemployment is skyrocketing, young people are abandoning the south en masse to seek jobs in northern Italy.
The driving force behind Italy's economy is the industrialized north, like it or not (unemployment in the mezzogiorno: >25%; in the north: 4.5%).
Covering these problems up by looking only at the data of the north is not only intellectually dishonest, it's dangerous.
Cherry-picking on the U.S.'s behalf? I'm not totally convinced that it's the USA that gets all the advantages, and I'm pretty damn sure that Mexico out of the three is receiving the most benefits out of NAFTA, and that can be supported through lower poverty rates and rises in real income. I've also read that the U.S. was essentially hurt by the alliance in the beginning before some sort of equilibrium was reached later on. Not all people believed that NAFTA was good for the U.S., and with reason.
What I meant by cherry-picking is that the U.S. negotiated agriculture in three different, bilateral chapters, which allowed them liberalized access to the Mexican markets, while reserving the freedom to impose protectionist measures (restrictions, tariff quotas) where deemed necessary.
All nations in the EU are developed nations with their own advantages to bring to the market table.
Romania? Bulgaria? Developed nations?
Really?
Their advantage is cheap labour. But cheap labour does not make for a developed nation. Ask Bangladesh.