A few facts which may whet our appetites for this debate:
This year, the Gentlemen’s semi-finals (2 matches) comprised 10 sets, 158 games and occupied the court for 711 minutes. By contrast, the Ladies’ quarter-finals, semi-finals and final combined (7 matches) comprised 16 sets, 153 games and 594 minutes. The Ladies' Round Four (8 matches) just outdid the Gentlemen’s semi-finals (by three games and eleven minutes) at 17 sets, 161 games and 722 minutes.
I have these statistics, match by match, round by round going back to 2001. The women rarely occupy the court for more than 40% of the time (looking quickly, 2017 was their best effort at 42%) and rarely play more than 40% of the games played. When looking at the “business end” of the tournament (quarter-finals onwards) the contrast is even more stark.
The situation is preposterous (and I haven't even touched on the quality of the play, which I accept is highly subjective). I know it is said that the women train equally hard and put in just as much effort. This is a spurious comparison. Many players (at lower levels) put in all the effort they can and train as hard as they can. But they would not expect the paying punters and the TV companies to pay large sums to watch them play. The paying public do not pay to watch them train nor are they impressed by the effort they put in. Quite simply, the men provide two thirds of the entertainment but are only paid half the prize money. To address this question, ask yourself this: if the boot was on the other foot and the Ladies provided two thirds of the entertainment would they be happy with just half the money? I very much doubt it.