My point was that India should switch to a single card/id for everything, and get rid of everything else including the PAN card. Eventually make Aadhaar digital, and chip based so that it can hold your DL as well. It is it bad for privacy, Yes. But what a country should spend on protecting or preserving privacy is a function of where it is on the socioeconomic ladder. If a single ID helps 80% of Indians (a billion people) navigate the labyrinth of our bureaucracy, I'm ok with it, _today_.
Besides, simpler rules go a long way in reducing the power of govt departments (which we can agree on). It reduces cognitive overload for citizens, as well as for govt workers. Factor in where the rest of India stands in terms of education etc, the value of simple rules cannot be overstated.
As someone who values privacy, there are still ways to do it. You just have to invest a lot more energy and time into it though.
