New Zealand First leader Winston Peters has promised to order "unsuitable" political appointees to return home from diplomatic posts if the party holds the balance of power next year.
The threat is a dig at Speaker David Carter, who NZ First members have clashed with and who has been tipped as a possible replacement for High Commissioner to Britain Sir Lockwood Smith.
Dr Smith's term ends early next year.
In a speech to students at Victoria University today, Mr Peters attacked the "brorocracy" of recent diplomatic appointments.
"As an example of how meritocracy has been abandoned in favour of a mainly white brorocracy look no further than how some of our high commissioners and ambassadors are being appointed.