This is wrong.
The highest it has been in the last few years is 55/72, there is no way that it would be much higher, especially as high as 60.
There will be students, although the /seemingly/ easy paper, who will only be able to access the lower grade/bands, thus having to keep the grade boundaries reasonable.
The paper, although seemingly easy, can mean that marking is harsher plus, it was actually a paper open to many stupid mistakes.