If you're working, you fork over a slice of every paycheck to the Social Security Administration. You do this partly because you have no choice (it's the law, after all), but also because you likely expect that come retirement, you'll receive a modest series of payments to support whatever other income or savings you have.

For years, though, many Americans have questioned whether Social Security will be there when they need it. Stories frequently pop up alleging future retirees won't get their checks because the program isn't sustainable. Let's take a look at these concerns and critically weigh them.

Will Social Security Last?

Fears of Social Security running out of money are widespread and long-running -- from 1996 to 2006 to now. All these dour predictions have had a real effect: Nearly half of Americans say they don't expect to receive any benefits from the program, and another third anticipate fewer benefits than are now promised.

Thursday, the Social Security trustee's report projected that by 2034, the system will no longer be able to compensate recipients at current levels -- or as the usual headline describes it, "Social Security trust fund will be depleted in 17 years."

This conjures up images of an empty bank account, betraying all those who paid into it. Was it robbed? Was the money ever there? What happened? In reality, this imagery is mistaken, and the claim overstated. To allay worries of its impending demise, let's first clear up some misconceptions about how the system works.

What Social Security Isn't

Your payroll taxes may come from a paycheck with your name on it, but that doesn't mean they go into a dedicated account, grow over time, and then return to you upon retirement. There isn't even a collective lockbox.

Social Security is pay-as-you-go: Today's receipts from workers are today's distributions for retirees. Just like any other form of government spending, money comes in and money goes out, more or less at the same time. This isn't to say the two always equal each other, either for Social Security or elsewhere. After accumulating for decades, outlays exceeded the program's non-interest income for the first time in 2010, as they have each year since. But that doesn't mean the program is on the fast track to insolvency.

We've Been Here Before

Remember, these fears have been around a long time, and Congress has acted to beef up Social Security before -- not just once or twice, but seven times.

Each action tweaked the system to extend its lifetime: In 1983, for example, Congress raised the retirement age and bumped up the tax rate. Similar adjustments today, even small ones, could make a big difference. One proposal -- lifting the marginal tax rate by an unremarkable one percentage point -- might patch the shortfall for an additional 75 years.

Other potential revisions, like changing how cost-of-living increases are calculated, could also prolong the program's viability. And politicians, for all their (many) faults, have a big incentive to maintain the program: Voters support it by wide margins.

This doesn't mean reforms are coming soon, of course. Can-kicking is a favorite pastime in Washington, D.C., and last-minute fixes are common. In recent memory, Congressional wrangling over issues like the debt ceiling and fiscal cliff shows how bumpy a bill's road to the president's desk can be. But with such a huge constituency behind Social Security, reforms are highly likely to occur long before a crisis hits.

Forecasting Is Fraught with Error

In any case, these possibilities are all very distant -- even skeptics' worst-case scenarios play out decades from now. So much could change.

Consider that, today, more and more people choose to work longer, delaying their benefits. Some use this time to shore up savings. Others just enjoy staying connected to their peers. As Millennials -- who outnumber their Baby Boomer parents by 15 million -- enter their prime earning years, revenues supporting current retirees should grow. Any number of other economic changes could intervene, rendering today's handwringing moot.

The Social Security Administration, like other government agencies, can't account for these possibilities, because they use straight-line math to project current trends into the future. While these projections might help paint a picture of what could happen, they are vastly inadequate for predicting what is likely to happen.

Few groundbreaking economic developments of the last few decades -- the Internet, China's rise, mobile technology -- were widely forecasted, much less by government officials. Whatever today's concerns, it is far too soon to analyze how tomorrow's unknowns will affect Social Security.

When I'm 64

For investors today, the takeaways are simple: First, while reforms are possible, if not probable, Social Security isn't going to vanish any time soon.

Whether you're receiving benefits now or hope to in the future, and while the future is yet unwritten, know that this isn't some untouchable third rail that will reject reform and ensure its own demise.

Reforms, if needed, are likely to be mild, and there is plenty of time to phase them in. As far as your investments are concerned, markets don't move on distant fears like these -- they look most closely at the next 12-18 months, or three years, at the long end.

Your retirement future -- or present -- is best served by sticking with your long-term investment plan, and tuning out over-hyped worries like this one.

Fisher Investments is an independent, fee-only investment adviser serving investors globally. To learn more about Fisher Investments, please visit www.fisherinvestments.com.

The content contained in this article represents only the opinions and viewpoints of the author. It should not be regarded as personalized financial advice and no assurances are made the firm will continue to hold these views, which may change at any time based on new information, analysis or reconsideration. Investments in securities involve the risk of loss. Past performance is no guarantee of future results.
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