America's Berlin Wall?

The US has sanctioned the building of a 1,100km fence along its border with Mexico. It says there are 12 million illegal immigrants in the country, mostly working in the black market (careful with that use of the word "black", we don't want to offend any ethnic minorities!). The idea is to keep all those unwanted Mexican and other South American immigrants away so that they don't sponge on the American Way Of Life. The BBC, reporting on it, called it America's Berlin Wall.
There is the US, one of the biggest powers in the world. A population made almost entirely of immigrants. Affluent to the extreme. Not caring much about the plight of others, spending useless money on even more useless projects. Making war, it seems, for the sake of it. People in poorer countries see the American way of life blasted over the media, in TV series, movies, internet, and it's no wonder that they see it as the land of milk and honey. Many poor, hard-working people must think to themselves that they could work less and have more if they went to such a place.
As such, America's success is its own downfall.
Perhaps they should lower the standard of living in the US. Ban multi-car families. Make air-conditioning illegal. Make it illegal for anyone to make more than 1% profit on any deal. Cut everyone's salary by 50% and raise taxes to at least 50%. Then, perhaps, Mexicans would not view the US as Shangri La. They would go about their daily lives happy that they were no worse off than their neighbours in the North.
Hang on - a thought occurs. If America did all those things, think of all the savings in fossil fuels that would be made. The reduction in CO2 emissions. The resultant improvement in the atmosphere and the lessened threat of global warming.
Perhaps it is a good thing to erect the fence. It may stop immigrants consuming too much.
I see it all now - the fence is the USA's contribution to cutting use of fossil fuels . . . ?
Nuff said.