The podcast episodes provided discuss discretionary spending and its impact on personal finance, wealth building, and achieving financial goals.

Several episodes highlight the need to cut discretionary expenses in order to reach 'millionaire status' by a certain age ('Cut These Expenses to Reach Millionaire Status (By Age!)'), caution against excessive discretionary spending that can derail financial progress ('Why You Need a Firm Financial Foundation'), and analyze a case study of someone struggling with discretionary spending habits ('Burning All His Money On... "Apps"').

The 'Marketplace Minute' episode ('A consumer pulse check') also discusses the decline in discretionary spending among consumers amidst broader economic conditions.