deliberate

de- liberate

1) to move so slowly as to remove the freedom and efficiency of an individual for personal gain.

2) a slow poke

3) inhibitory factor in the efficacy of a system.

4) a selfish drain on society.

They were so deliberate that they wasted the time of the people willing to help them.
Their deliberate nature caused a situation that both missed their window of opportunity and interfered with the flow of the workers.