Economist: When national governments dispense funds to local governments to spend on local projects, any local government can receive a greater proportion of government funds by creating more local projects than other local governments create on average.
Evaluate
What was the moral to this story? They're asking for what proposition was illustrated by the statements, so they want us to extract some general idea.
There was a pot of government money, and the more projects you created the bigger a share of that pot you could receive. Because of that incentive, there's more spending and taxation by the government than there would be if the national government didn't offer the pot of money to local governments in the first place.
Illustrated Proposition
In a sense, this is a Plan backfiring. The national government was trying to help local governments with local projects, but this ended up being a more expensive way of doing things. All things considered, people would rather government accomplish a given goal with the least amount of taxation required.
Having local governments fund local projects was better than having the national government fund local projects, because the latter created some incentive that led to more bloat / more spending.
Goal
Let's look for an answer where a Plan backfires and we end up worse than we would have been if we hadn't tried that plan?
It might involve details like incentives leading to more bloat, but maybe it won't match that specifically.