With a sluggish economy, uncertain job growth, the most serious housing recession in more than 20 years, record oil and gasoline prices, ramping food costs, and a foreign policy landscape that's challenging (to say the least), decision makers in the United States, public and private, have more than enough to be concerned about, near-term, most analysts and citizens would agree.

Still, the above wasn't enough to prevent the annual "alarm sounding" about long-term concerns, such as Social Security and Medicare, the likes of which occurred again this week when the Social Security Trustees released their revised 2008 actuarial balance, which is a status report.

Moreover, while it's never prudent to ignore the tax and benefits implications of entitlement programs as large as Social Security and Medicare, it's important that investors and taxpayers also keep in mind one undeniable reality pertaining to statistical analysis of this sort. Namely, that we're dealing with longitudinal projections stretching out decades in which -- if any one of 20 variables (or more) change -- receipts and outlays would change substantially.