Recent data has revealed a significant life expectancy gap between the wealthiest and the poorest individuals in France. Men from the wealthiest 5 percent of the population live on average until 85 years old, while men from the poorest 5 percent live until about 72 years. For women, the gap is slightly smaller, with a difference of about 9 years between the wealthiest and the poorest. This gap has widened slightly since the 2012-2016 period, when the difference among men was 12.7 years and among women 8.3 years. The life expectancy gap is not primarily explained by access to hospital care or smoking, which are only indicators rather than root causes. Instead, the real factors include difficult working conditions, chronic stress from job insecurity, and poor living environments, such as inadequate housing and limited access to nutritious food. Men with a monthly living standard of around 470 to 500 euros often work in physically demanding jobs with irregular hours and are exposed to toxic substances or harsh weather conditions. These conditions take a toll on the body over time, in contrast to senior management roles, which typically come with much higher incomes and less physical strain. Psychological stress from financial uncertainty also contributes to the gap. Living in constant worry about meeting monthly expenses, juggling multiple jobs, or fearing job loss can create an "invisible wear and tear" on the body that accumulates over decades. Additionally, the living environment plays a role, with poorly insulated homes, fewer green spaces in neighborhoods, and diets that are limited by budget rather than nutritional value. A striking example of this disparity is that the wealthiest women live on average 17 years longer than the poorest men. This gap is even larger than the well-known difference in life expectancy between men and women in general. Interestingly, while women typically live longer than men across all income levels, this trend reverses among the poorest 30 percent, where men tend to outlive women of similar conditions. The findings raise a concerning question for the future. If the life expectancy gap continues or widens despite medical advances, it suggests that current public health policies, while essential, are not enough to address the underlying social factors affecting mortality. Improving healthcare access and anti-smoking campaigns are important, but they mainly address the symptoms rather than the root causes. The real challenges involve working conditions, urban planning, access to quality food, and efforts to reduce long-term job insecurity. These factors, often outside the realm of traditional medicine, appear to have a major impact on how long people live.