Should a 10-Point Grading Scale Be The Standard?

[Ares]

Especially in the U.S., should a 10-point grading scale be standardized across all levels of education by the DOE? I have always preferred it for its simplicity in converting numbers to letter grades. I am fairly certain I had a 7-point grading scale in elementary school which never made sense. Changing the cutoff for failing can obviously be contentious but the fact that this debate is still going on throughout the country is surprising.

10-Point Grading Scale:

A = 100-90
B = 89-80
C = 79-70
D = 69-60
F = 59-0

7-Point Grading Scale:

A 100-93
B 92-85
C 84-77
D 76-70
F 69-0