It pretty much has nothing to do with who the best players are skill wise or salary wise but it depends on statistics, how many games they play in (Because a lot of managers don't play their good players for every game to manage game shape), and fans pick who's in it. Personally i hate allstar games because they are pointless and 99% of the time the best players arent even in the game.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs