Can I say “ corruptive government officials have been dealt with “ to mean they were fired or dismissed?

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Corrupt, not corruptive 😁😉

And yes, ‘they’ve been dealt with’ means they’ve probably been fired.

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Try this in your sentence instead of "corruptive".    "the corrupt".    Corruuptive is an adjective but rarely used.  Corrupt is used 99.99%.

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No dear Dimin this is grammatically referees to parallelism point of view 
When you talk or write about the past all verbs should be past.
Use ((Had))
For example 
Yesterday I went to a park, bought an ice cream 🍨 
Then saw my friend 
All should be past