If it’s ever applied, this will backfire on elites.
If everybody lives near where they work, the potential for labor disputes flaring up into riots and uprisings increases.
If everyone shops at the store near them, shortages and price increases could likewise more easily flare up into violence.
But more likely perhaps, is a scaled-back version. “Liveable” communities that have shops for necessities near-by, but still allow people to work and shop outside the 15 minute walking radius.
It worked around the coal mines for centuries.
A 15 minute walk for the average healthy individual is a mile.
That means that a person's whole life revolves around an area a mile in radius from their home.