GP did not articulate their point well, but you've straw-manned them about groceries. GP specifically enumerated housing, healthcare, transport etc - not groceries.
I assume HN users are American unless informed otherwise. I'm glad that your health insurance bureaucrats can make a salary, but it's nonsense to believe that's a good way to run a society, even if it is profitable for some or can be deemed to be "free-market provision". There are better models that still generate income for pharma and doctors and nurses.
America made the car part of its identity. Your society was moulded by automotive lobbying in the twentieth century, on the hill and in town planning. It's great that car makers can generate income, but they've mugged you. All the mandatory spending on that sector could be optional, and the rational actors in your economy could use that money to maximise their personal profit functions in a way that encourages entrepreneurs to create new value.
It simply should not cost six figures to turn a school graduate into a doctor or lawyer. It's great that universities generate income and employ people, but you made bad choices there. A professor spends 10-20 hours a week teaching a class of fifty - research grants come from industry - where's the fucking money gone?
House builders deserve to get paid, but when you condemn a generation to rent slavery, you curtail their economic activity, making yourselves much poorer collectively and individually than you would be if your young could afford to take part in other parts of the economy. It's not like your rent-seekers can't cream income from other capital investments, there are ways to turn money into more money that increase liquidity for businesses. Housing isn't mandated by the laws of the universe to be an income stream.
If we translate Maslow's pyramid into goods and services, at the bottom we have groceries - which moooost people can afford, yay, you win a point; then housing, which is touch-and-go for a large minority; then leisure time and retirement planning and non-vocational education, which are enjoyed by only the wealthy.
And this is because pretty much every move your country makes is individualistic instead of collectivist... where the individuals in question are specifically rich and powerful ones. So you have apparently phenomenal GDP per capita but only 90% functional literacy, and lots of you die indigent because you got cancer. That GDP, I assert, is fucking fictitious. I'm sure America is rich one way or the other but it looks like the books are being cooked. If you claim that a university degree is $50k then your claim of $50k GDP is bollocks. Where is the actual production that you write down as $10k for having a broken arm set?
John Galt shat in your mouths and you're calling it stew.
Sorry if this rambled. GP, please let me know if I've fleshed out your point or missed it entirely.