There actually is hourly rates for B767, B787, A340, and B777 Relief Pilots.
Here are the 4th year rates.
............ day........night
B767.......75.43.....83.62
B787.......78.61.....87.51
A340.......83.33.....92.17
B777.......88.31.....97.15
This is what the company pays out. But, before you see your money, it is lumped in with all the other "PG" pilots and then you all get a share of the pot. This is what Position Group is all about. Take your money and share it with the less fortunate ones. (RJ or EMJ First officers)
Non PG pilots (hired prior to 1999?) are excempt from this socialist scheme and get to keep their money for themselves.
When you bid to a higher position outside of PG, you will also get to keep your money. But if you decide for any reason to bid down to RP at any time in the future, you will once again have to share your money in the Position Group.
eg. 8th year 777 RP pays 101.66 (day) and 111.45 (night). But you would only get about 90.00