> The fact that it's impossible to make good decisions doesn't change the fact that a decision has to be made, nonetheless.
Does it? Maybe the right answer is not to make all decisions in one place: maybe the right answer is to let every citizen make his or her own decisions. The one who is willing to trade the emotional cost of moving back in with his loving family in order to have more money for lunches with friends does so, while the one with abusive parents chooses to cancel cable rather than moving back in — and so forth.
> We might also want to consider why pensioners are living off of complex financial relationships instead of, like, cash
Because storing all of one's life savings under the mattress is susceptible to theft. Even taking a broader definition of 'cash' to include a bank account, would you at age 60, with another 20 years to live, rather be earning 0.06% (the current savings account rate) or 1% (or more) per annum? At 0.06%, one would need about $100,000,000 to earn the $64,000 median U.S. income in interest. Alternatively, if you figure that you will live a maximum of 50 more year, you will need over $3 million in order to retire and just spend the money. You gotta invest to have something to live off of.