His most acute frustration is his difficulty in mobility; his feet in particular often give him trouble.
It contains sections on wealth, poverty, income, mobility, jobs, and wages, and just a heap of useful information.
From a political perspective, the erroneous but strategic conflation of inequality and mobility makes obvious sense.
early 15c., "capacity for motion," from Old French mobilité "changeableness, inconsistency, fickleness," from Latin mobilitatem (nominative mobilitas) "activity, speed," figuratively "changeableness, fickleness, inconstancy," from mobilis (see mobile (adj.)). Socio-economics sense is from 1900 and writers in sociology.