The poorest members of society are disproportionately indebted and so they will disproportionately benefit from having those debts reduced by inflation.
Chile has a separate currency called UF that is inflation adjusted. The UF is used to denominate almost all loans to middle class. While they are earning generally in pesos but their debts are in UF and hence not reduced by inflation. The poorest members do not have access to loans at all.