As a number of people have pointed out, defining your question such that it can be answered is important. I would also offer that it is important in the first place to be very careful not to make the question too broad, because the assumptions you make will render any statistical analysis either impossible or meaningless for example:
"What is the death count of Wall Street?" cannot be reasonably answered without also analyzing every impact of every company that trades there, has borrowed or lent money at any time, or has sold a product to a person or company that has done so. Additionally, such analysis would need to include all impacts, both positive and negative; how many lives were saved by products developed and commercialized, how much has life been improved by the economic activity enabled by Wall Street, what is the metric for measuring the improvements in standard of living that have occurred since the middle of the 1800s? All these things need to be addressed in finding an answer to the question you asked in the first post (which as another poster has mentioned, seems framed in such a way as to already have an answer in mind, and to be based largely in politics, rather than economics. And while economics is a truly tricky field to accurately quantify, it's got nothing on political questions)
I can see two much better ways to go about asking your question. One is a very specific microeconomic question, and should be answered with concrete case studes: "What, historically, has the impact on life expectancy been when companies engage in [Insert Business Practice Here]?" You can make a good case for looking at fraud, embezzlement, hiring overseas sweatshop labor etc, but should pick a specific behavior or two so you can study individual case examples, such as suicide and welfare rate changes among Enron employees, or the difference in workplace accidents/fatalities/suicides between the overall US population and, overseas sweatshops. This has the advantage of being specific, and more easily attributable to the people that actually did something unethical. It has the disadvantage of narrowing the scope of your question down significantly, and a lot of specific data may not be available to you.
The other is to broaden your question into a valid macroeconomic question (or pair of questions, really), such as "What is the impact in lives and standards of living of a recession?" and "In what ways do financial and government institutions contribute to the causation and severity of recessions?". The strength of this question is that there is a ton of data out there relevant to the question you're asking. It's also a topic very worth talking about: there are a lot of things we do to cause this sort of economic hardship, and not all of it is as simple as "Wall Street took money and caused problems", and I think discussing this honestly is a good thing. The downside is that reasonable economists can and do disagree on the answers to these questions.