Can America withstand mass immigration that creates mass illiteracy?

Can America withstand mass immigration that creates mass illiteracy?:
"John Wayne said, “Life is tough; it’s even tougher if you’re stupid!”
.......In 2013, however, according to the National Institute for Literacy, an astounding 42 million Americans cannot read, write or perform simple math.
Another 50 million cannot read past the 4th grade level.
It costs taxpaying Americans $240 billion annually in lost industrial productivity, uncollected tax revenues, welfare, crime, poverty and food stamps."