Well - first of all, the balance sheet is not used to report profitability. That would be the Income Statement.
But aside from that - are you really saying that, when an organization reports profitability for a period in time, that it must include liabilities estimated indefinitely into the future? So when IBM, for example, reports profitability for FY08, that it must include liabilities indefinitely into the future, including through 2016, or 2020 or 2050? I can assure you that this is not the case - not only would it not be relevant for the current reporting period, but I don’t even know how an organization could do that. How, for example, could IBM be expected to anticipate it’s payroll obligations for FY2016, or it’s R&D budget for FY2020? The answer is: they can’t (not with any validity, anyway).
The bottom line is that profitability is reported for a period in time, typically a fiscal quarter or a fiscal year. Here, for example, is IBM’s Income Statement for the past 5 fiscal years. You’ll notice that they do not, in fact, try to estimate any and all liabilities indefinitely into the future.
As I noted, when any organization reports profitability, it’s for a specific period in time. For the SSA, they have shown that, for each fiscal year going back to 1983, they have in fact been profitable. And current projections show this continuing until roughly 2016. But hey - let’s look at actual numbers, shall we (link - sorry, it’s a PDF):
For FY08 Total Income to the SSA was $805 billion (a combination of contributions, taxation and interest). Contrast this with total expenditures of $625 billion (mostly in benefits, but with an administrative expense of less than 1% or $5 billion). This gives us a net INCREASE in assets for FY08 of $180 billion. That’s what I call profit.
Now again - if you wish to argue that at some point in the future, the SSA will no longer become profitable, then I could support that. IF current projections are valid, and IF nothing changes, then IN 2017, the SSA will no longer be running at a profit. But for right now, and using any generally accepted definition of profit, the SSA absolutely is profitable.