Former Australia captain Steve Waugh joined the chorus for Jaques, who has scored 658 ING Cup runs at 109, and 655 at 59 in the Pura Cup this season.
Jaques has been averaging a run a ball in the ING Cup and has scored four centuries this summer.
"The time to pick him is now - he's a form player and it's hard not to take him," Waugh said.
"I think it's time to give him an extended run.
"He provided a glimpse of what he can do when he made 94.
"It is getting to the stage where Australia will be really looking to get their plans ready for the World Cup - and if he is to be part of those plans then you would like to see what he can do now.
"He is scoring runs everywhere ... for his state, country and in grade cricket.", and plundering three tons in the Pura Cup and four one-day hundreds in the ING Cup this season.