Not a single word, but here is an idiom which I casually came across that might interest future visitors. It means to attempt the impossible, or to place one difficulty on top of another.
To pile (or heap) Pelion on Ossa
a. to make matters worse; aggravate or compound a situation.
b. to engage in vain or futile efforts.
Random House Kernerman Webster's College Dictionary
Otus and Ephialtes were the ambitious twin sons of Poseidon. In their greed and quest to conquer Olympus they threatened to pile two mountains on top of each other. Mount Olympus is said to have been the bottom mountain, with Mounts Ossa and Pelion upon Ossa as second and third.
The rather sophisticated idiom in the OP's sentence would look like this
A ten-percent growth rate is like piling Pelion on Ossa:
In Greek mythology, Mount Pelion was the place where Achilles' parents, Thetis and Peleus were married. The goddess Eris, who was not invited, brought a golden apple to the wedding party with the inscription "To the Fairest". The dispute which ensued between the goddesses Hera, Aphrodite and Athena led to the Trojan War.
Greek Gods and Goddesses