This is just one of the aspects that support stronger governments and corporates that put the interests of themselves and a tiny section of the population (those who help these get even stronger) above everything else. While some people discuss about this or mass surveillance or tracking, most of the populace isn't even aware how liberties are being lost and how "the power of the people" is becoming more of a carefully constructed mirage. Things seem to be moving in the direction of a dystopian society where appearances mask reality and common people are kept complacent with entertainment and other things to keep them occupied.
I don't see a cashless world happening in the next few decades, because it will take a lot of work to get people out of poverty first while some entities focus on removing cash. Even if it were to happen, a cashless society would still have many different pseudo-currencies and barter systems (like those that exist in different contexts and systems today). What's worrying though is that in the future many goods and services may become inaccessible (if one wants to avoid electronic transactions) unless one resorts to the black/gray/underground markets.