Probably none of them filed suit because there wasn't enough evidence. How does one prove a grope, unless the guy left a slimy, muddy hand print with DNA or fingerprints?
Also, they probably didn't file suit or go after money purposely to show credibility to their cause, that he didn't have the ethics to become governor.
Decades ago, Anita Hill came forward with sexual harassment allegations against Clarence Thomas, who was up for Supreme Court Nominations. As far as I know, she never sued for money. Her coming forward wasn't about that. Unfortunately, back then, as in Arnold's case, not enough people believed her. In fact, back then, SHE was the one slandered & dragged through the media in a bad light.

It's hard to prove sexual harassment, and harder to get people who want to believe it.
People keep saying Why didn't Maria know or see it? Some psychologist on a TV interview said she grew up with brothers & cousins & uncles who were the "bad boys,", philanderers, and a bit wild & dangerous, and probably a little disrespectful in how they treat women overall. That was her
environment, what she was used to, what she had known. She never really would have been attracted to a mundane, safe, bookworm type. Arnold, in a lot of ways fit into the kind of men she was
used to. Unfortunately, he turned out to be a sexual cheat, too.

She didn't escape it after all.
I think Arnold married her for one overriding reason: She is a Kennedy. They are our American "royalty." (Whether you like them or not.) That is what that family
symbolizes. He has wanted for decades to be an American, go after many of the American dreams, win and be #1
in the world at stuff. He was the #1 bodybuilder, then #1 at the box office for movies. No WAY he didn't have political ambitions when he first met her. He's too egotistical and narcissistic. he is all about
ambition. He wants to take over the WORLD. He's joked and admitted many times, he'd wish the U.S. would change the laws and allow people not born here be allowed to run for president. He'd do that in a heartbeat, no regard for Maria's wishes.
Since that couldn't happen, what better topper to his life's ambitions than to be a part of THAT particular family America's #1 "royal family." Since it was unlikely he could ever be governor back then, marrying a Kennedy was the closest he could get to Camelot and that family. As much as he loved Maria, he loved what she was a part of.
(Likewise, Lisa Marie Presley, in an interview with Oprah, realized
in hindsight, that Michael Jackson, had always had an obsession with Elvis. If he could have, he would have had kids with her, to seal that obsession, of having the off-spring of Elvis. Marrying her was the closest he could get to Elvis.
Also, as much as Princess Diana loved Charles at the beginning, she loved Charles because he was a prince.)
Maria has
always said she never wanted a man in politics. He didn't listen or respect her wishes on that. That was never part of Arnold's goals. Arnold is a long time planner and goal-setter. He sets his goals
far into the future. He got to marry into the Kennedy family and what that symbolized for him, and when he had the chance,
of course, he went for the governorship. Maria being a Kennedy and standing by her man through the groping allegations
helped him win.
Am I the only one who can see this through line in all of this?