>why don't you publish all your purchase info online? Along with where you bought them, what time, how etc? While you are at it, also publish your travel info - including mode of travel, time of travel, source, destination...

Yes I prefer that for everyone (not just me), including people in government, so that I don't have to worry about hiding the information. Hiding the information has its associated cost.

Transparency for everyone to level the playing field.

Sure its your business to be private but as times goes and as technology advances it going to be more difficult and expensive.