The text justifies this behavior, observing that: a career can be a means to an end rather than an end in itself.
Explanation:
The increase in progression of the career of an individual refers to career advancement. The advancement of the career means moving from low level or basic level of the job to managerial position in the same field. Sometime shifting from one occupation to other also causes advancement in the career.
Household income is calculated by combining income of all the members in the family who are fifteen years and above. The household income generally grows at an increasing rate, then levels off and moves into decline during retirement stage.
