> it's not because of resources or good land or good people: all of which it has in plenty.
Land-wise, Mexico's got real issues. Its core territory is limited, encircled by mountains, the country has massive desert and jungle areas that make imposing central leadership difficult, and it offers very little in the way of internal or external defenses. Mexico City is shockingly easy to invade via Veracruz, and the US Navy is about the only entity preventing anyone from blockading their primary port.
Mexico's geography isn't awesome.
A lot of their economic limitations are self-imposed, e.g., the 1917 constitutional nationalization of the country's mineral resources killed foreign capital investments of exploration and production.
Oil revenues fund government programs instead of funding Pemex's growth. The state needs its oil revenue to function, which is a major limiting factor.
> Mexico should be booming due to NAFTA.
Despite all the above, it is: http://assets.bwbx.io/images/users/iqjWHBFdfxIU/iDpyf7X2wzkM...
And that's just the on-books economy, which excludes a significant amount of cashflow coming both from remittances, and the narcotics industry which funnels a massive amount of cash into the Mexican economy. The most conservative estimates are staggeringly big: it's a significant percentage of their cash economy.
It's the world's 11th-largest economy. It was 13th just a few years ago.
Their exports are skyrocketing: https://www.stratfor.com/sites/default/files/styles/stratfor...
Foreign direct investment, while obviously highly driven by fluctuations in the US economy, is on balance far higher than they've ever been: https://www.stratfor.com/sites/default/files/styles/stratfor...
> So much of this development we now see in East Asia could have very easily gone right across the border if it had a working political system.
East Asia saw such an influx of investment precisely because their wages were relatively low, thanks largely to their poverty.
You can't have it both ways: either the economy gets to be stable and robust with a functioning government that can control crime, or it gets to have low labor costs, which is what drove the investment in East Asia: relatively lower labor costs.
The narco trade is the one thing probably suppressing wages in Mexico the most, and is, in a very unusual way, driving the shift of manufacturing from East Asia to Mexico. (As is automation.)
But I agree that building a city on the border won't change much (if anything).