Atherton said it was not feasible to expect the stronger boards to give up their broadcasting revenues. However one possibility was a more even spread of monies to be derived from internet rights.
He cited Major League Baseball, where those rights are pooled together and the profits spread between the franchises.
"Internet rights are in their infancy but ... they're trying to create a level playing field."
Atherton also said the Indian Premier League impacted negatively on both the West Indies - whose home season slices through it - and New Zealand, some of whose players invariably arrive for an England tour straight from the IPL "and are therefore under-prepared or badly prepared for test cricket".
"It's in the long-term interests of England, India, Australia and South Africa to have eight strong nations rather than four."
Meanwhile Canterbury are staring at an embarrassing Plunket Shield defeat in Rangiora today.
They'll start the third day against Otago at 87 for five, still 44 adrift of making Otago bat a second time.
The day was highlighted by centuries for Otago by Mark Bracewell and Jesse Ryder, who both made their second tons of the season, as they reached 374.
Bracewell hit 129 off 187 balls, Ryder a rapid 120 off 113, with 22 fours, as they shared a 178-run third wicket stand.
Otago fell away later in the innings, losing their last seven wickets for 57.
However test left armer Neil Wagner and Blair Soper sliced through Canterbury, test opener Peter Fulton (17) and middle order contender Dean Brownlie (1) both having an off day.