Leonard Beeghley who is the stanard reference in the field of socio economic classes defines the midle class as someone making around 57,000 andthe working class with somebody making around 40,000.
TUC wants to expan it all the way down to 20,000 (which no one else does)
The thing that TUC doesn't get is that "Middle Class" isn't all about income. It is a socio economic class Definded by education, community standing, home ownership, job type and income in addition to earning potentail. If my income dropped below a certain level or I lost my job I would still be middle class. However midd;e class income does not start below thw poverty line as TUC woul have us believe
Leonard Beeghley The Structure of Social Stratification in the United States. Boston, MA: Pearson, Allyn & Bacon.
College-educated workers with considerably higher-than-average incomes and compensation; a man making $57,000 and a woman making $40,000 may be typical.
Blue-collar workers and those whose jobs are highly routinized with low economic security; a man making $40,000 and a woman making $26,000 may be typical. High school education.