In the pre-1914 era Australia did not develop an ocean-going merchant navy. The problem is well recognised in previous studies that assumed that it was high Australian wages that made the operational cost of deep-sea vessels uncompetitive on a global scale. This article reconstructs historical shifts in the Australian market for a seagoing workforce and demonstrates there was low recruitment of Australian labour. Drawing on new sources and inspired by efficiency wage theory the article argues that it was this shortage of a domestic labour supply that constrained the development of a national deep-sea shipping industry.