Our modern institutions, the banks and the corporation, arose in a period when business was very capital intensive, you had to build big factories to compete. But recently, large areas of business have been changed by technology to require far less capital. Not all of them, building chip factories has not, but look at say the media business, it used to cost a huge amount to build printing plants for newspapers, but this is all starting to go away, taking with it the rationale for the large corporation which used to have to be that big to finance the capital.

Silicon Valley is funding the smaller scale firms of the new economy, but that does not require huge amounts of money; meanwhile Wall Street is mostly large amounts of leveraged capital that does not have productive use in the real economy any more, so it tends to feed into asset price bubbles.

Its a big long term shift in the balance.