I reckon it's just the €150 or €75( for WAV's) that they're referring to which is fukall use if you've to replace your vehicle from Jan 1st 2021(those who had to replace vehicles up to Dec 31st have been given an extra year,SI No 175 of 2020)...if the 5 year licence is included that amounts to a whopping €50 per year!!
If they don't do something genuinely fiancially viable,it'll be licence holders like myself who have taken up other employment that will be able to replace vehicles...because credit won't be available to "fulltime taxi drivers"!!