Your mom (not you specifically, but the average person's) is being provided for by the collective, ie currently working-age people's pension contributions. She, as a worker, paid taxes in her own working age, and financed stranger's parents' lives, and now the new generation does the same for her. It's a many to many relationship, while the old style arrangement was more point-to-point. The children did the literal manual work to keep their parents fed and cared for, while now they pay some strangers to do it, using their pension.