Actually I'm the one who works 24 hours
Actually there are a lot of people who are basically 'on' 24 hours a day. Guys on rock tours - you might not be working that second, but it's not like you can go home or go out and party, or go to the beach. Lot's of people on call. Next time you go to a hospital look at how tired some of those people are, they pull huge shifts. There are people on job-site locations all over the world and when I did that we worked 12 hour days, six days a week and went in on our off day too because there really wasn't that much to do, and our working environment was far nicer and more stimulating than the living arrangements - and we had a bitching time off deal, and it was pretty much expected that we'd work like dogs for 3 weeks solid, then get five days off, in Europe. I mean the people who work a lot of hours get some great perks for doing it.
The guys who head up major corporations and their minions? I don't much like them, but I sure can't call them lazy, the put in modo hours, as do rising young executives. When I worked in government relations at the university I could start calling DC and finding people at their desks at 6am, and they would be there past 6 every night. Often Saturday too. Most of the university professors put in 60 hours on campus every week, between classes, meetings (god did we have meetings), labs, and/or research offices (having a little room all to myself in the heart of the library was beyond awesome) and their office hours at the main office.
Long haul truck drivers, and plenty of short haul ones do hours that are actually illegal. And that's not even counting the number of Uhaul trucks filled with stuff being driven by amateurs on no=sleep schedule. Anyone who is running their own business is going to be doing far in excess of 60 hours a week.
And I'm not even into minimum wage land yet, where you have to work 70-80 hours a week just to get by, and at that you most likely are not making the OT stuff, minimum wage don't work like that. You have to work two-three places, bit here, bit there to get your hours, so that the time you ain't spending at work you're spending chasing work, or hustling between jobs.