Sometimes cleaning up code has positive business ramifications - for example, I took the time to design a component carefully in the past few weeks for work, and when it came to start a new user story for a nearly identical feature for another view, the careful cleaned up design carried over seamlessly & got finished in about a day of work. This will be assuredly reused again for another feature with nearly identical logic/models, and thus saved the company almost 2x the time of development.

Sometimes you just have to argue for the effort being expended, and my managers all had the foresight to push for doing it right when it had large ramifications.