Interestingly, although there is a bit of a correlation between lower incomes and higher incidences of financial stress, higher incomes generally do less to reduce the incidence of financial stress than many people seem to expect.
That survey is typical. The overall rate was 70%, and among high income earners, it was 57%. This is consistent with general findings about the diminishing marginal utility of additional income or wealth. Past a certain point, usually the main factors in happiness are something else.