I'll play!
If the impossible "everyone did it" occurred, and another political or social movement didn't erase it or make it irrelevant, supply would shrink to fit demand more closely as demand shrank. Your ability to retire would be dramatically slowed vs the current system initially, but the work you needed to do would be tremendously diminished, which would speed retirement back up again as prices stayed level or decreased from current levels. The Fed would be apoplectic the entire time.
The financial sector would lose all its speculative customers. Wall Street would be an arrangement of low-fee Edward Jones outfits that wanted to be your buddy, to get you to invest in their index fund brand, functionally as nearly-free as every other index fund brand.
Inequality would begin to reverse as money was no longer funneled into junk, and everyone enjoyed the gains of the stock market. Creators would still have a lot more, but it would no longer be possible for the new iPhone to create a megacorp.
Vanguard would face a crisis as Facebook has today. Eventually it is forced to admit it has too much control over the world to be neutral, since it technically owns everything, and too many naughty actors are afoot. It begins voting its shares to oust CEOs and boardmembers engaged in the sort of practices that create situations like the opioid epidemic of the previous century. This creates the biggest political crisis of the era, as people debate whether we have entered a cyberpunk utopia or dystopia, the winner of which determines whether Vanguard incorporates governments or governments nationalize Vanguard.
Aforementioned crisis eventually leads to the banning of the production of most firearms, and another, similar crisis. Heavily armed nations fractionalize and collapse in the last world war, while the remaining nations form the United Earth Administration.
We stop making the planet uninhabitable, so going to other planets to ruin them instead no longer sounds reasonable to anyone, anywhere. Space exploration returns to the cozy idealism of the 1970s, moderated by the presence of hostile aliens, which conveniently all look almost the same as we do.
Radicals with strong opinions about friendly aliens are ignored, because campaign finance reform at the United Earth Administration finally disincentivized pandering to a radical base. No one remembers what gerrymandering is, and it falls in the linguistic dustbin of the "hanging chad."
To everyone's surprize, cyberware implants never take off, because people enjoy spending time with their neighbors instead of having datajacks in their heads that cause cancer.
We cure cancer, because what else will we spend the money on? Datajacks still don't take off, and Sony goes out of business.
Somehow, Ford, having sold off its remaining vehicle assets to Enterprize Honda GmbH, successfully transfers its remaining assets into the production of the Ford Galacticar, which licenses the new interplanetary space engine from Lockheed-Wesson. Ford eventually merges with Saeder-Dupont, creating Ford Global.
Marketing would gasp and die or transform into a kind of positive social propaganda - advertising would be skewed towards sustainability resources and community organizations.
Competition would reignite for national pride projects in the absence of war., but these would skew towards civilization milestones rather than monuments. Lockheed-Wesson would lead the space race, and an antitrust action would force them to divest assets to Ford Global, creating the two most profitable companies of the 22nd century.
Diageo-Forman would develop a drug like alcohol that didn't affect your lifespan. There would be a "lost decade" as the world was forced to relearn moderation.
Scientists discover that Galacticar magnetic stabilizers can break up amyloid plaques in the brain, harmlessly, leading to a cure for Alzheimers and a new medical technique for everything from MS to autism. The human lifespan being barely limited does not lead to famine, because nobody would even think about wasting food anymore.
In 10 billion years, everyone has to come up with something to stop the universe from shrinking or expanding too much. M Knight Shaymalan and Doctor Who reveal they already fixed the problem.