The Current State of Wealth Inequality
Wealth inequality has widened globally. In the US, the top 10% of households own approximately 70% of total wealth. In Japan, roughly 30% of households hold zero financial assets while the top 10% control over half. Thomas Piketty's observation that r > g (the return on capital exceeds economic growth) captures the structural dynamic: those with capital accumulate wealth faster than those who rely solely on labor income.
How Compounding Accelerates the Gap
Compounding is the mathematical engine of wealth concentration. $100,000 invested at 5% becomes $432,000 in 30 years, while $10,000 becomes only $43,200. The initial $90,000 gap expands to $389,000. Wealthier individuals also access higher-returning investments (private equity, venture capital) and optimize tax efficiency through professional advisors. The starting-line advantage compounds exponentially over time.
What Individuals Can Do
While structural inequality requires policy solutions, individuals can harness compounding by starting early, even with small amounts. Tax-advantaged accounts like NISA, iDeCo, 401(k), and Roth IRA were designed specifically to help ordinary workers build wealth. Financial literacy is a powerful equalizer: understanding compound interest, fee minimization, and tax efficiency allows anyone to participate in wealth creation. The belief that investing is only for the wealthy is itself a barrier that perpetuates the gap.