Earlier quoted context omitted.
"Welder's generally aren't middle class regardless of income" is true if you define middle class in the way it traditionally is in relation to capitalist and modern mixed economies, that is, the middle class are those for whom both capital holdings and labor provide a substantial share of their income, usually because they derive the bulk of their income.by applying Thier own labor to.their own capital (though the mi…
I don't think definitions of "middle class" which refer solely to proportion of income derived from capital have ever really been more mainstream or useful than "white-collar"/"blue-collar" or salary-range based distinctions. Even Marxists whose entire economic philosophy is based on capital relations are usually happy to bracket wage-compensated managers alongside smallholders in the petit-bourgeoisie on the basis t…
The classical economic classes are misleading when viewed as an inherent heirarchy (in pure capitalism, they might be -- at least, capitalists are definitively at the top -- but that is a feature for which pure capitalism has been criticized.)
The classes, instead, represent commonality of interest from common manner of relating to the economy (income level is also a source of potential common interest, but it is distinct from, though correlated with, class.)
And I think there is plenty of room to debate whether Uber drivers are genuinely primarily applying labor to their own capital, or whether the key, predominant, a d essential capital is that provided by Uber.