Wow, you're right! Thank you, and this bolsters my case ten-fold.
Fifty-thousand dollars for fourty years is only two million dollars. Many, many people inherit two million dollars.
I'd like to bring up another point.
Let's consider the average engineer working for a corporation. Let's say he earns $100,000 per year. This may seem like a sum with which someone could begin to amass wealth. Indeed, with the proper decisions and luck, this is certainly possible. However, we must view this person in the context of the economic structure. The corporation he works for is controlled by the elite (a quick Google search will reveal that stocks are overwhelmingly held by the elite class). The elite owners, already wealthy themselves, become wealthier with each $100,000 they pay to this engineer. The engineer is left with expenses from which he earns nothing. The elites, on the other hand, has so much wealth, that living expenses are miniscule in comparison to their net worth. They have so much money, that they are capable of significant investment.
In a capitalistic system, investment is what drives the economy. Within that economy, there is competition for limited resources. The wealthy class is disproportionately advantaged to compete for those resources, and they inevitably succeed. The deck is so stacked at this point (as it was circa 1900), that the wealthy class not only has a competitive advantage, but it controls all the resources (Wal-Mart is an example of this at the corporate level). The elite have basically taken competition out of the equation. And this, again, demonstrates that upward mobility is a myth.