If I can't believe that they are following the law, my data is already public. I remember there was a debate sometime back where income tax info was needed to decide whether you qualify for certain subsidies or not and there was no way to get the income tax data even for the govt (different dept).
Income tax aadhar linkage should not be optional in the same way paying taxes isn't (in my opinion). I mean only 10-2000000 above with more than 1000000 rs income (declared). That's just disgusting.