So you think people won't work?
I'll work just has hard, or harder that I do now - on my humanitarian projects.
I won't have to - but I will.
I would be soo bored and feeling left-out just sitting around watching the world change and not being an agent of that change.
Let's say, just for fun, those who exchange don't work, but instead create jobs for the 93 million in the USA alone who are "not in the work force" and hence are probably not working.
Let's say 81 million of those 93 million start working again.
And just for fun, suppose the 1 million exchangers stop working (which they won't).
That's a net gain of 80 million people now working.
And that's just in the USA - add in all other 208 countries.
The real ELEPHANT would be the HUGE increase of people now working.