Thailand's tax base is dangerously narrow: only 5 million people actually pay income tax despite 40 million being in the workforce. The article argues this reflects deeper structural problems—low income across the economy, a large informal sector (48% of GDP), and an aging population requiring higher state expenditure. The core challenge isn't raising taxes on the wealthy (less than 1% of population) but broadening the tax base through economic growth, quality job creation, and better incentives to bring informal workers into the system.