The parliamentary rules on entitlements do not cover the issue of MPs with convictions.
That means the former Labour MP for Mangere, who served more than five terms, is entitled to hefty travel allowances for ex-MPs.
So is his wife, Maxine.
They can claim for up to 12 free domestic return trips a year and a 90% discount on international travel provided it does not exceed the cost of a return business flight to London on Air New Zealand - about $10,000.
On the basis of a $600 return airfare to Samoa, that would amount to 18 flights a year at $60 each.
On Tuesday, Field was found guilty of 11 bribery and corruption charges and obstruction of justice charges.
He is due to be sentenced on October 6.
Prime Minister John Key said in Cairns last night that "at a moral level" the entitlements for Field or his wife were inappropriate.
Parliament's Speaker, Lockwood Smith, said he was willing to review the parliamentary perks rules.
He acknowledged last night there was no reference to the coverage of former MPs who had been convicted of a criminal offence and that under the existing arrangements, the entitlements would apply.
But he said: "Given the seriousness of this matter, I am willing to explore how provision could be made to address the situation."
Former MPs can claim the perks only if they were elected before 1999.
Field was elected in 1993.
Keneti Muaiava, lecturer in Samoan culture and dance at the University of Auckland, said the title Taito - one of highest chiefly titles in Field's home village of Manase - could be removed only by those who bestowed it.
Field was given the title when he was 19.
"He's already in jail. In the Samoan community - being looked down at like that - he's already in jail," Mr Muaiava said.
"I feel for him . . . But he needs to be made accountable.
