No, the value is what you can do with it. Now, if you want to sell the data, then having a competitor that offers it for free is reducing the value, but if you want to use the data, the value is independent of the cost.
Fine for you to say when your salary is probably north of 100K+.
If Im on disability benefit? Do I want my land lord to know this? Or my friends? I guess I should just shout it as I walk down the street. Embaressment and being an easy target dont exist in your world being healthy i guess and you're lucky.
Before landlord allows you in they ask for proof of income one way or another. And after you moved in it is quite hard to kick you out unless you misbehave. As for friends: if they asked about your income, you refused to answer and they still look it up - what kind of friends they are then? And btw the tax records show how much taxable income you had, not its source.
No landlord has asked me for proof of income. You think this peasants and lords system you talk about is mandatory ? I don't care about friends, people are a waste of time to interact with when they're all dumber than me.