The document discusses contract and agency labor (CAL), which has become an increasing issue for unions globally. CAL refers to precarious work arrangements where companies outsource jobs to other employers or agencies. This limits workers' job security, pay, benefits and union protections. The growth of CAL poses challenges for identifying responsible employers and enforcing labor laws and rights. Unions are also threatened by losing members and bargaining power as more jobs become temporary or insecure through CAL.