Again though, how exactly are they going to improve their situation if they don't wish to further themselves career wise, ie take a management position, or are unable to get that position even if they want it? Even if they're highly productive and improving their situation (per se) within their own job, they're then reliant on their employer to provide them with an increased salary and/or bonus, which they a) may not be able to give or b) don't wish to give. A good example of that is the NHS nurses and the denial of the 1% pay rise they requested.
Given the years of pay freezes, or pay rising in line with a phony inflation rate, and the higher cost of living, it's not really helping the working class regardless of how productive they are. And to be fair, it's not necessarily through any fault of their own.