Can 401(K) Plans Provide Adequate Retirement Resources? 
A 401 -LRB- k -RRB- retirement plan is a defined contribution plan that is funded by various savings and investment products . The adequacy of a 401 -LRB- k -RRB- is based on performance of those products and your contributions . Based on the current trends , the great risk to retirement is human longevity . The odds of most 401 -LRB- k -RRB- s being adequate to fund retirement is somewhat slim . 