Short of getting the 100% economic bonus elsewhere, or invading planets rather than flipping them?
No.
For what it's worth, it applies as a racial bonus-it's not a multiplier against everything. So say if I had 4 economic resources (and assume they're maxed at 39%), +15% from techs, and then +30% from governments, I'd be at +201% already-having 3.01x the income. The MCC would then raise me to 4.01x income, or a 33.22% improvement over where I was at.
In gigantic games with 6 or even 7 economic resources, plus the bonuses from anomalies, even a +400% bonus is not entirely out of the question (318 before anomalies), under which circumstances the MCC provides a mere 20% boost overall.
But the point that the MCC is obtainable well before any other 100% in bonuses is very valid.
