"With rising incomes, the share of expenditures for food products declines. The resulting shift in expenditures affects demand patterns and employment structures"

Ernst Engel's quote suggests that as incomes increase, people tend to invest less of their cash on foodstuff. This shift in spending practices has a direct effect on the need for foodstuff and the employment structures related to them. For example, as individuals invest less on food, the need for foodstuff reduces, resulting in less jobs in the food market. Likewise, as individuals invest more on other goods and services, the demand for those products increases, resulting in more tasks in those markets. In conclusion, Engel's quote recommends that modifications in spending patterns due to increasing earnings can have a considerable influence on the demand for particular products and the employment structures connected with them.