But there's a big caveat: The reported figures are net numbers, so the income for example, will include capital gains, and exclude all deductibles. There are lots of deductibles here, so for a salaried worker without any capital investments, the income number will be lower than their actual income, due to deductibles. Likewise, if you have lots of appreciating investments (stock that pays dividends, sale of stock, whatever), your income will be higher than your salaried income.
Same for fortune (or net worth). If you have more debt than equity, then your net worth will show up as zero. Basically, if you own a house worth $1MM, and have $1MM in some other debt/loan, your net worth will show up as zero...even though that debt could practically be at zero rate, from a relative, or whatever.
So, all in all, it's a neat concept that was (AFAIK) designed for more transparency, as well as lowering financial crime (i.e, why is your neighbor driving a lambo, if he's on gov. benefits?) - but it's not optimal for things like checking salaries. Lots of people are very interested in salaries, in order to have some number when negotiating their own salary. Just one example.