What caused the unintended consequence of "there's no such thing as shovel-ready projects?"

A) Any of these causes could be a reasonable answer.

Explanation:

When the government needs to spend money on service projects or products, there are many roadblocks in the way.

1. The US House has the "power of the purse," because All Bills for raising Revenue shall originate in the House of Representatives (U. S. Constitution, Art. I, sect. 7)

2. Most State Governments have to approve contracts and vet private industries to complete public works projects.

3. Like all business structures, all of the factors of production need to be in place before work can begin.