Here is my question:
Why FIA do not try(maybe they do) to bring current WRC car into the same categories with 2017's car in next few years like DTM did several years ago?

1、It's easy to reduce current cars' weight(maybe 50kg-100kg) to match 2017's cars speed
2、It's very 'cheap' for private drivers compare to 2017's cars
3、Can boost private drivers join the top categories with less cost
4、A proper solution for the drivers who without license to drive the 2017's cars
5、We already have R5 class there are no need to create a intermediate category between R5 and A8(correct me if I am wrong)
6、There plenty of old WRC cars available in the market to use

So, it seems all the aspects are good thing for WRC in the future and what do you think about this?