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Not all, but a good chunk. Definitely less than half. Somewhere around 18% of current US GDP is healthcare spending [1], growing at around 5% year over year. Education spending is somewhere around 5% of GDP [2]. It's hard to figure out how much actual growth is occurring there since most of the ridiculous increases have been specifically in college, not in K-12 which is the bigger share. Total increase seems to be so…
The Q2 4.2% is too convenient a number to make your point. On average US GDP growth has been around 2% over the last decade: http://www.multpl.com/us-real-gdp-growth-rate/table/by-year
And before that it was a consistent 3-4% average. Picking the decade following the largest recession in history as your base is also a bit convenient.