Why do airport signs state 10,000 baht proof of income for individuals but ask single travelers for 20,000 baht?

The discrepancy in income proof requirements at airports may arise from different regulations for individuals versus families. While signs indicate a requirement of 10,000 baht for individual travelers and 20,000 baht for families, single travelers may be required to show proof of 20,000 baht to demonstrate sufficient financial means, possibly reflecting a stricter enforcement of immigration policies focused on ensuring travelers can sustain themselves during their stay.