I would take that bet. Let's start with housing, which has almost doubled as a share of income since 1960. (See e.g. [1]). Same thing with medical care (including insurance premiums, since more medical costs were out-of-pocket back in the 50s and 60s).[2] Groceries are a bit cheaper as a share of discretionary income, but only by a few percentage points.[3] And of course we're assuming no one goes to college, which wasn't true even in the 50s and 60s. College costs have soared since then.
1. https://ti.org/antiplanner/?p=18800
2. https://www.healthsystemtracker.org/chart-collection/u-s-spe...
3. https://ourworldindata.org/grapher/food-expenditure-share-fa...