Hadn't read about Sargeant, but it doesn't feel much like a false accusation. Once again, we have a number of incidents and allegations.
I suspect Jones probably had more information than is currently public to take his action. But we don't know, because in fact his accusations don't look public. They became public after he was suspended, but with no details. So I don't think this much falls into your original category. The other thing is, we need to understand these things are happening especially with respect to politicians, even if they manage to wangle a not guilty verdict. OJ got a not guilty verdict, but it is probably a good thing that people are generally aware that getting into a relationship with him may not be such a good idea.
In fact his supporters are calling for more information to be available, not less.
It is indeed tragic if it turns out that these multiple accusers are all completely fabricated, but somehow I doubt it.
The thing about accusations is that there is usually some level of impropriety. A common defense is that the accuser had a consensual relationship or encounter.
Another linked story lists the following about another Englishman:
According to The Sun, when Sir Michael and Ms Leadsom were on committee together, she once complained of cold hands to which Sir Michael is said to have replied: “I know where you can put them to warm them up.”
Leader of the House Ms Leadsom passed a dossier of claims to No 10 after Sir Michael was allowed to escape censure for an incident in which he put his hands on a female journalist’s knee.
Absent public pressure, these folks are going to continue to make lewd comments (not illegal), grope on people (in a legal way, most likely), and generally get away with boorish behaviour highly detrimental to their office, position, party, and most importantly to the people forced to interact with them.