A way to send money to specific players?

Currently working on an Economy Datapack. I've been stuck on making a way for players to send money to other players from there "bank scoreboard."
Since you can't specify the player, and amount through chat input, I've thought of another idea:

Run /trigger pay set/add {$} 
Then chat pops up with list of players that are currently on the server.

player_1
player_2
player_3
...


You can then click on one of these players and it will send the amount of money you set above, after a confirmation, to that player.

The problem I'm having:
I gone through many different variations, but they all have one problem. It requires to me to have a separate tell-raw, and pay function for each player or player_id I assigned. So I eihter have to have a limit on how many people use the datapack on the server, or have to make a specific function for each player thats using the datapack.
Questions:

What would be a good way to implement a /pay feature?
How would I go about making the /pay feature I thought of above?

Other Info:

Java 1.20.1