Yes, it is non-parallel. The correct form should be “SPENDS” and not “SPENDING”
Explanation:
Parallel structure or parallelism is a literary device in which the elements in a sentence are similar in their grammatical form. Parallelism makes the sentence consistent and balanced.
Example: if an idea is expressed in simple past tense, then to maintain the consistency, all ideas expressed should be in simple past tense
.
For Example:
CORRECT: He came, he saw, and he conquered
CAME, SAW, and CONQUERED are all forms of simple past tense
INCORRECT: He CAME, he SAW, and he IS CONQUERING
The above example makes the sentence inconsistent as it used both simple past tense and progressive tense.
Parallel structures can be used
1. With coordinating conjunctions
2. With Correlative Conjunctions
3. With phrases and clauses of comparison
4. With Items in a list
