A number of senior Australian political figures have also voiced concerns.
Former prime minister Paul Keating attacked Aukus as "worst international decision" by an Australian Labor Party government since World War I, which would send the country down "a dangerous path".
Another former leader, Malcolm Turnbull, also questioned whether the UK was a feasible long-term partner in the treaty given "fundamental existential problems" with its economy.
"You've got to ask yourself whether Britain is going to be able to sustain investment in its navy and its military in the years ahead," Mr Turnbull said in a speech at the Defence Club in Canberra.