Actually, it was caused by the greed of those at the top.
They didn't have any real money incidentally......it was all EFT funds, which means, no real money.
When they realized that people wanted to see the real money, they panicked, and next thing ya know, they're asking for bailouts, and looking for someone to give them real money.
When they received the money? They held onto it, as they were too embarrassed to admit they'd lied.
Madoff is a good example of this.
And that is why, with all the cash they've been given, they are STILL not putting it out in loans and the like.
Trickle down NEVER works. Only trickle up, and if you don't believe that, then check out the dude from India who won the Nobel Peace Prize for trickle up economics.
Ugh, trickle down, trickle up, blame it on this or that. If you want strong investment, don't overtax the wealthy. That does not mean they should not be taxed a reasonable amount. At the same time, you must also be certain that the majority of the non-wealthy earn a decent income, because they are the ones who drive the economy as they are the ones who
purchase the bulk of all goods sold. If they don't have the money, everything collapses.
It's not either or, you can't destroy the wealth of a country and expect it to grow. You also cannot allow the middle class to disappear and expect it to grow. There has to be a good balance.