No not everyone will get it if their incomes are over a certain amount as in this table

Table 2: Income limit at which Family Tax Benefit Part A including the supplement is no longer paid Number of Children
0-17 years Number of Children 18-24 years
No children One Two Three
No Children - $102,249 $113,978 $126,607
One $100,801 $112,530 $125,159 $137,788
Two $111,082 $123,711 $136,340 $148,969
Three $122,263 $134,892* $147,521* $160,150*

A bit hard to read like that, might make more sense online at the FA site