decasualization
noun
de·ca·su·al·i·za·tion (ˌ)dē-ˌka-zh(ə-)wə-lə-ˈzā-shən 
-ˌka-zhə-lə,
-ˌka-zhü-ə-lə-
: the process of eliminating the employment of casual workers in order to stabilize the workforce
Word History
First Known Use
1892, in the meaning defined above