The prize money at Wimbbles comes from the sale of tickets
Mens finals tickets sell for 5x the price of the womens finals , such is the disparity in the interest of the punters. Thats why there was a pay gap. The women whined and got it changed.
If anything it should be the men whining about the pay gap as the top women regularly earn more than the top men in the tournement by playing in doubles, but no, as usual, like most men, they just get on with it.