KEY POINTS

401(k)s are an especially important retirement tool given that pensions are on the decline and Social Security "could be insolvent by 2034," and because an alarming number of Americans have little to nothing saved for retirement individually: A recent study by GOBankingRates found that 42 percent have less than $10,000 socked away.

Even President Trump, during his State of the Union, touted the success and importance of 401(k)s. But he neglected to mention that "most workers don't have one yet."