If you see your neighbour sleeping on the floor, its not poverty. The truth is that you might not know what he/she is enjoying health wise. Read this:

The concept may seem unnatural, but a firm floor is actually better for your spine than a lumpy mattress. There's also a few tricks you can use to help you become more comfortable sleeping on the floor.
Difficulty:
Moderately Easy
Instructions
1.
Choose a carpeted area. For obvious reasons, a carpeted floor is more comfortable than a cement, hardwood or tiled floor.
2.
Make sure you have lots of space to spread out. Your comfort level will diminish if your spot on the floor is obstructed by furniture or otherwise cramped.
3.
Use fewer pillows than you normally use on your bed. Because the floor doesn't have the same spring effect as a mattress, your pillows won't sink as they normally do. Therefore, you'll need fewer pillows to achieve the same neck elevation that you usually find comfortable on a bed.
4.
Vary the spot that you sleep in. That way, you won't press an outline of your body into your new shag carpet.
5.
Sleep in a sleeping bag. A sleeping bag is as cozy as it is convenient, because it covers the floor and you at the same time.
Tips & Warnings
*.See a doctor if you sleep on the floor to relieve back pain. Sleeping on the floor can relieve back pain, but it's important to determine the cause of the pain, as well.
*.Don't sleep on a floor that you think might be unsanitary. You might be annoyed if your friend makes you sleep on the floor, but you'll be downright furious if you end up getting fleas from it.

Credit:http://www.ehow.com/m/how_2270962_sleep-comfortably-floor.html