5 ideas
He first uses the gift to torment a new deputy chief who had forced him to rewrite his formulaic letters, poking his head through the office wall until the man is taken to an asylum. He then becomes a showy burglar, falls for a jealously guarded wife, mistakenly takes pills that cancel his gift, and ends up stuck forever inside a wall on the rue Norvins.
People judged unproductive, such as the elderly, retirees, artists and writers, receive only a set number of days per month and simply stop existing for the rest. A black market in time tickets appears at once, and the poor sell their days to the rich, who then live more than a month in a month.
The story allows exactly one fantastical change to ordinary life and keeps everything else realistic. It then traces that change's practical, legal and social consequences in a flat, matter-of-fact tone. The comedy and the critique both come from how calmly institutions and people absorb the absurd premise into their normal routines.
Once a state rations something as basic as bread or time, it must rank who deserves how much. That ranking turns productivity into a measure of whose life counts. Any rationed good, even existence itself, also becomes a commodity, so the wealthy buy back what the rules took from the poor.
A miraculous ability does not transform a small person. It magnifies the grievances, vanities and habits they already had. Watch what someone does with sudden freedom from constraint, such as settling an office score or seeking notoriety, and you see how deeply routine and resentment shaped them.