That’s the UK definition of middle class, which is still how they use the term.
In countries without nobility and/or stratified more by wealth based class than hereditary social class, “neither poor nor rich” has been the rough definition since before my boomer parents’ parents were born roughly a century ago.
Even UK included artisan class in middle class, people doing jobs that require immense amounts of training to do, such as Glovemakers and Jewellers and Tailors and Accountants, but don’t usually actually own their own business
That’s the UK definition of middle class, which is still how they use the term.
In countries without nobility and/or stratified more by wealth based class than hereditary social class, “neither poor nor rich” has been the rough definition since before my boomer parents’ parents were born roughly a century ago.
Even UK included artisan class in middle class, people doing jobs that require immense amounts of training to do, such as Glovemakers and Jewellers and Tailors and Accountants, but don’t usually actually own their own business