A retired golf enthusiast is scammed out of his life savings and a country club membership, but when he sees an old man die and moves up to number five on the waiting list, he devises a killer plan to jump to #1

I was going refer to "the axe" the film about a someone killing themselves into a job. Find the main goal and build your line around that. Could be fun.

Hello, Costa-Gavras did a movie about a desperate man who kill all the best candidates to have a job.
It's a black comedy, I liked it a lot.

imdb:

"Le couperet"
A chemist loses his job to outsourcing. Two years later and still jobless, he hits on a solution: to genuinely eliminate his competition.

I think the key is to make the logline funny so that we understand that the movie is a satire and we don't judge the main character as we would do in a serious movie. I suggest to make a joke linked to the golf world (I hope you're an expert about the subject, or you have to become one before even come up with a decent logline :) ) -you need something like "genuinely eliminate the competition".

Good comments above and agreed with Lee. The very nature of the character and his plan put audience empathy at great risk I'm not sure a 'Save The Cat Moment' alone could help in this case.

Hope this helps.