Luai has signed a two-year deal with the Chiefs, which includes an option in his favour for a third year.
The playmaker and his family flew to Port Moresby on a private jet over the weekend, where he was wooed by the country's Prime Minister James Marape.
Upon his return, the Samoan international indicated to the Tigers his eagerness to join the Chiefs as a foundation player for their maiden campaign in 2028.
"I think everyone wants me to say (I did it for) the tax-free (salary) and how appealing that is," Luai said on Wednesday.
"But that's not what got the deal signed. Being over there, you sort of realise that it's bigger than a game over there.
"And when the time comes, we'll be able to change a lot of lives for the better.
"It was probably more the vision that I resonated with … being Polynesian - there's a lot of similarities to Samoa, and what that team's eventually going to do for those people is grow a nation."
Luai is permitted to leave the Tigers because of the clauses he was given in his five-year deal.
The five-eighth is in the second season of that contract - which permitted the playmaker to activate an option to stay or leave after years three, four and five.
Luai, 29, has told the Tigers he will take up his option to stay at Concord on a $1.2 million a season deal in 2027, but has indicated he will then move to the Chiefs for their first campaign.
"I'm here for 18 months, and wherever I am right now, I'm going to give my all to the team, to my brothers, to what we've built here," Luai said.
"This place will be a great place to be and play at when the time comes to leave."
Luai's salary will be completely tax-free and his signing represents a major coup for the Chiefs.
The start-up club's entry into the NRL was met with concern over their ability to lure top-level talent, given Papua New Guinea's security issues.
"It was important, that's why my (family) came with me," Luai said.
"It (safety) was all there ... and there's some really (great) people behind all of that and how it's going to work."
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