When the proportion of casual workers in total employment increases as compared to regular salaried workers, the phenomenon is known as Casualisation of workforce.
Casualisation refers to a situation in which employment becomes more temporary, irregular, and lacking in job security. Such workers are usually not entitled to social security benefits, paid leave, or regular income, and they often work in informal sectors without formal contracts.
This trend may reflect rising vulnerability in the labor market, especially in developing economies where formal employment opportunities are limited.
Explanation of Incorrect Options:
(i) Formalisation: This implies an increase in formal sector jobs, which is the opposite of casualisation.
(iii) Unemployment: Although casualisation may be associated with underemployment or poor job quality, it is not equivalent to unemployment.