You're comparing the average expenses to the median income, which isn't the right measure. You're also comparing average household expenses to individual income

You're comparing the average expenses to the median income, which isn't the right measure. You're also comparing average household expenses to individual income. But let's assume you weren't. $1300 per week adds up to $5,633 per month. If you're comparing that to average monthly expenses of $5,253, that means the average household has $400 left over per month. That's a savings rate of around 7%, which is actually higher than the measured U.S. average of about 3%.