Just excuses!
I've worked with people and this problem for more than 35 years. All this complaining is just excuses for laziness in picking up after themselves and being organized! I have found that most people with this problem grew up with their Momma doing it for them and they never had to do it for themselves. All this talk of ALWAYS being too busy is just plain BS! If you give them the space, place to put things, and a little dedicated time, then they should be doing it, plain and simple! Clean up should be a part of their evaluation as much as anything else. Clutter and mess are unsafe! Ask any OSHA inpector or Fire Marshall! If you can't find things after clean up then you're not doing it right! The goal is to make it easier to find things and yet keep it neat, clean and safe! That's why there are file cabinets, folders, labels, boxes, markers and the like. If your a boss, THEN BE A BOSS and lay the law down on it!