At least in the US I’d say it’s because the government pumps billions and billions in subsidies to the different farm sectors (70+ billion a year for beef alone). The products you mentioned don’t get that funding and don’t sell the volume either.

It’s sad that even the idea of a very high tax rate for even the top 0.1% is off the table. I really like the suggestion of capping net worth at $999 million and the government gets the rest.