First of all, I deal with constant deadlines & confidential company information & financials. If I'm not there, no one can do my work for me. The work waits for me & it backs up. Deadlines can be missed. I don't want to deal with the fallout from that. Just a few days can keep me behind for at least a month, to get caught up.
When I take vacations, I plan in advance & work like a dog (sometimes on my own time) to be ahead of myself in work, so I won't have as much to catch up. An unexpected illness doesn't allow for that.
Second, I rarely, darned near never, get sick. Thank God for that.
This Winter I had a killer cold. The first in over 8 years. I had it for just short of a month. At least 2 weeks of it were absolutely miserable. I pumped myself full of over-the-counter cold medicine. Stocked up on Kleenex & cough and throat lozenges. I'm a chronic hand washer anyhow, plus I used Purell constantly. When I used the restroom I took my Purell & wiped down the door handle & light switch & various knobs & handles, before I left the room. I told everyone at work not to answer my phone & I didn't answer anyone else's. I also told them not to touch my keyboard or mouse, or anything at my desk. They were warned. I also did my best to keep to myself.
Guess what? Even after nearly a month NO ONE caught my cold. If proper precautions are taken, it can be done.
Only once did someone tell me I should stay home. I answered: "Are YOU going to be the one who does my work while I'm gone? ALL of it?" After that no one said a word.
There are more reasons than trying to get extra bonus money for people to work through a cold. It all comes down to taking as many precautions as possible so as not to pass it around.
I also work with someone who takes so much "sick" time off of work that all her days are used up by March. Every. Single. Year. Everyone including me, has to pitch in to pick up the slack. Then she whines & tries to connive & barter in order to get more time off & so that her pay won't be docked if she does. Then complains when it is.
I'd way rather see her come to work sick.