Two recent articles shed light on the 'crapification' of jobs and the rise of income inequality:
Martin Wolf on the Low Labor Participation as the Result of the Crapification of Jobs (Naked Capitalism)
The Measured Worker: The technology that illuminates worker productivity and value also contributes to wage inequality. (Technology Review, via John S.P.)
While both articles offer valuable insights into the secular trend of stagnating employment and wages, I think both miss a couple of key dynamics. As a general starting point: if you want to understand the 'crapification' of jobs and wages, we have to look at the 'crapification' of the economy from the perspective of those who are doing the hiring: the employers.
From the perspective of employees, the 'crapification' of jobs boils down to 1) low/stagnant wages for 2) highly structured, boring, repetitive and often difficult work. The decline in the quality, pay and upward mobility of jobs is directly related to the dynamics of globalization, financialization, and the surplus of ordinary labor and capital: