Some leaders in the area have called for so-called prevailing wage standards to be relaxed to help hold downs costs of the rebuilding effort in the tornado damaged area.
McCaskill says it's important to attract highly qualified workers to Joplin.
"Prevailing wage makes sure that you can train quality workers. And particularly when you're building public infrastructure, I think that's incredibly important."
She says the city should not be able to hire workers at less than the area's prevailing wage rate.
"I mean, one of the problems you have in states where you don't have prevailing wage, is you wind up having people come in, and just because it's the lowest bid, they get a project, and then the work is not done of the highest quality."
McCaskill thinks bringing well-paying construction jobs into the area could help Joplin's economy recover.