"Drew Sullivan said it best when he said he's happy to have guys push him to play every year and the day when the coach tells him he's not good enough to be in the team, he'll know that GB is going in the right direction," explained Achara, who scored 16 points in GB's 90-58 triumph against China at the London 2012 Olympic Games.
"I feel the exact same way. I want guys to be making sure that I look terrible compared to them as that means the next batch have come through and I know that will mean our game has raised a level."
Despite being one of the three remaining Olympians to have regularly suited up for his country since the Games, Achara knows he is not guaranteed a place on the roster each summer as new players emerge, and that is the way he likes it.
"Ideally there should be no sure spots on the GB team," said the Scottish forward.
"Every guy has to be working hard every day, even during the season, as if they are not stepping up during the season, they are not going to be in the GB team.
"That kind of pressure is needed to get guys to the next level."
With so many new faces Achara admits he "didn't know what to expect" ahead of last month's camp in the lead up to the game against New Zealand.
But after five days of intense practice, the 32-year-old came away impressed by the new call-ups.
"I was happy and very proud to see some new very talented kids who are willing to learn and that's the most important thing," said Achara.
"They've learned a lot. Coming in and training twice a day, learning all these new plays and then playing a team with the quality of New Zealand is tough.
"We've still got a lot to work on, we all know that, and hopefully the guys stay humble and hungry and continue to work to become the best they can for GB."
Building a new GB team post-2012 is still a work in progress.
Achara believes that in order for Great Britain to get to the next level, it will require players to make a long-term commitment to being consistently available for selection.
"We've got so many new talented guys, but talent alone is not enough to win," he said.
"We need commitment and we need all those guys in camp, every year fighting for spots.
"Without a core group of guys we're never going to reach the success [we're after], so we need commitment, year in year out, so that when guys come into camp we already know each other's games and can just get to work."
As for his own future, Achara says he will keep answering the call to play for GB for as long as he can.
"I love playing for my country!" he enthused.
"I just want to play, and the way I see it is that even if I am not playing vital minutes, I just want to be part of the squad."
Achara added: "Even if I am not making the team, I just want to be around the guys and make sure we're going in the right direction.
"I don't know exactly what my role is going to be within the squad in the coming year but I'm definitely going to work hard during the season and if coach [Joe] Prunty wants me to be part of the next squad, I'm happy to do so."
The Great Britain Senior Men's summer programme continues this month with an invitational tournament in the Netherlands. Find out more.