golden ticket
n.— «Their story highlights the troubles facing both foreign workers and island employers utilizing seasonal H-2B visas, which workers often refer to as “golden tickets” but require strict commitments long before it is always clear whether jobs will even need to be filled.» —“Bulgarian students stranded without jobs or housing” by Margaret Carroll-Bergman Inquirer and Mirror (Nantucket, Massachusetts) June 29, 2007. (source: Double-Tongued Dictionary)