"This is so that Lotto can sell tickets through the checkouts, worsening gambling spend at a time when Lotto bases itself on the myth of being a family concern.
"This was also because Countdown threatened to close Lotto counters in their stores."
As revealed by the Herald, Countdown last month began the widespread roll out of Lotto sales through its checkouts rather than at special instore counters.
Mr Jones said: "No other Lotto retailer can or has been allowed to do this, only Countdown" and Lotto NZ staff including the chief executive and chief operating officers were "under strict threats not to say anything" about the arrangement.
That was why Lotto NZ should be forced to appear before select committees, he said.
A Countdown spokeswoman said: "clearly this is a matter for the Lotteries Commission and they will address the comments raised''.
"Countdown is one of many Lotto partners across New Zealand, and we have a very good long standing relationship with the Lotteries Commission".