Joining the dots can be fun, but if we think that anyone 'in charge' has thought this through to any significant extent we're in la la land.
What we're really looking at is the time proven 'Law of Unintended Consequences', because even when we humans do try to 'think things through' we are incapable of calculating the probabilities and exigencies beyond a very limited range, and often not even then because we have this tendency to only see what we want to see.
Just so with FRT, it's a 'solution', there is 'money' and 'politics' involved. The interested parties concerned with 'solution', 'money', and 'politics' will only see what they want to see, and be highly motivated to ignore what they don't want to see, regardless of the consequences to everyone else further down the track.
The RIPA shambles and abuse is a clear example of the process, but we can find it wherever 'solution', 'money', and 'politics' are in the driving seat.