Over the past decade, financial advisors have grown upbeat aboutthe future of Social Security benefits – especiallyfor today’s retirees. Many advisorsencourage clients to delay the start of benefits past age 66, toearn Delayed Retirement Credits that they believe will be paid infull.

Related: The future of Social Securitybenefits

The common wisdom is that Social Security will need tweaks inthe future, such as incremental boosts in payroll taxes and agradual increase in the full retirement age. Although these changeswill negatively impact younger workers, they won’t devalue thebenefits today’s retirees have earned.

This thinking is now being reinforced by governments andpolicymakers around the world. For example, Germany’s central bankhas just proposed gradually increasing its nation’s officialretirement age from 67 to 69, on top of an already-adopted increasefrom age 65 to 67. Currently, it’s politically acceptableeverywhere to propose increases in the retirement age.

But it may not stay that way.

As young people tune into Social Security, they are awakening tojust how much the scales have tipped against them. Raising theretirement age slams young people in three ways because it: 1)makes them wait longer for benefits; 2) makes them pay into thesystem longer; and 3) keeps older workers in the labor forcelonger, crowding out jobs for young people. Rebellion is festeringover this issue, and young people have some ammunition on theirside.

As the 2016 Social Security Trustees’ report makes clear, theSocial Security system is running greater operatingdeficits annually (without regard to “interest” income) whileheading toward a zero trust fund balance in about 18 years.

The money today’s retirees claim to have earned isn’t reallythere, and the idea that younger people will collect their fullpromised benefits is far-fetched. Voting-age people under the ageof 60 outnumber those 60+ by about 3 to 1.

Finally, it’s fundamentally fair that all retirees, present andfuture, share some pain for fixing a troubled system. The mostviable way to require retired people to share the pain is to reducetheir benefits, or tax them more.

It’s hard to imagine any politician advocating this now. ButHillary Clinton has symbolically bowed to the voting power ofyounger people by refusing to endorse an increase in SocialSecurity’s full retirement age. Bernie Sanders captured youngpeople’s imaginations by defining a path that could lead them tomore economic power, with a greater long-term stake in SocialSecurity.

Are financial advisors really helping retired clients by tellingthem not to worry about receiving 100% of promised Social Securitybenefits? Time will tell. But it’s not a bad idea to hedge a littleby recognizing the potential for a youth-driven revolution. Willthe kids one day vote to reduce their parents’ Social Securitybenefits? Stranger things are happening in American politics.