You should be. The free allocation of capital to opportunities is the key determinant of economic growth. Low marginal tax rates, low regulatory burdens, concretely specified property rights, and the easy transferability of such rights play an important role.
The two Presidential demogogues and their journalist groupies are spouting meaningless cliches about greed and free-wheelin' Wall Street megabuxters.
What they don't tell you--perhaps they don't know--is that Wall Street is already heavily regulated with rules designed by smart attorneys. Maybe that means that more regulations designed by more smart attorneys would have a low probability of solving anything, but a high probability of getting in the way.
Let's go back in time, say, six or seven years ago, when the Federal Reserve dumped liquidity into the financial system with a 1% Federal Funds rate target. The commercial banking system lent the excess moola, Wall Street created hedge funds and customized securities, and Main Street bought or flipped or refinanced mortgaged real estate.
Then, the Fed decided that liquidity was causing "imbalances" and decided to jack up interest rates, and, after a respectable period of time, the liquidity disappeared, hedge funds blew up, securities tanked, and Main Street got stuck with a big house that won't sell or excess condos or a pesky ARM.
Boiled down to its essence, recent economic history is easy to understand. You should be concerned about Wall Street. You should be concerned also about government involvement.