Lack of material comfort will bring misery. That is not to say that the more material comforts the happier the person. These two things are not on a continuum.

In Maslow's terms, frustration of deficiency needs will lead directly to unhappiness. But once these needs are satisfied they contribute nothing to feeling. There is no requirement to continue satisfying the deficiency beyond the base amount.

Stuffing oneself to obesity is as big a problem as malnutrition. Enough is enough.