All of the bubbles have been indirectly from the maturation of the world's economy as it has manifested itself in outsourcing and automation.
what? no.
That's like blaming the Great Depression on the Industrial Revolution.
In a globalized economy, everything is indirectly related to everything, but the biggest problem with the American economy isn't as sophisticated compared to other economies as it used to be.
so what? the babyboomers took over the economy in a huge way and directly influenced it with their behaviors and policies, not to mention lifespans.
And their Boomer kids got greedy and fucked it up for all of us.