Ha ha! My dear you expressed what was in my mind. I have written on the same subject on my facebook posts. Cash transaction is the safest form of transaction which protect your identity. It also make us safe from the authoritarian governments.
Money is the most important thing in human society. We do every business to earn money. It is the source of the power. When banks and the governments will be able to make everything digital, they would have full control over the wealth of everyone. That will lead us to a state of slavery. There will be a society where opposition would be destroyed by simply stopping them to use money.
I think people should not be lazy. They should prefer cash transaction. They should not let banks and the governments to screw themselves. But common man is not aware of these dangers. He/she is happy to get some cashback after using his/her debit/credit card.