Which factor does NOT contribute to the failure of parent-country nationals?

The factor that does not contribute to the failure of parent-country nationals is the increase in non-taxed salaries. When expatriates are offered non-taxed salaries, it often serves as an incentive to work abroad, potentially increasing their overall compensation without the burden of taxation. This financial benefit can make the relocation more appealing and mitigate some of the challenges associated with living and working in a foreign country.

On the other hand, lack of motivation, family adjustment issues, and emotional maturity can significantly impact an expatriate's ability to succeed in a new environment. Without motivation, individuals may struggle to engage with their roles or adapt to the new culture. Family members who do not adjust well can create additional stress, leading to difficulties in the expatriate's work performance and overall satisfaction. Emotional maturity is crucial for managing the emotional and psychological challenges that come with living in a different country, as it helps individuals cope with stress and adapt to new situations effectively.