The ideal job for Bushie would be to be a minister. It's really not taxing work in the least, especially for a country minister, and even if you have to perform weddings and funerals, you're still the boss. Other people do the heavy-lifting. Bushie could watch TV all day, read his Bible, and prepare sermons. Why wouldn't he want to do that?
Aside from what shua said (and the "not taxing work in the least" comment belongs in the Deluge) you must also consider that Bushie is
a morbidly obese unemployed man who lives in his parents house and passes the time watching television, consuming junk food, soda, and pornography, and posting the inane details of his his life on the internet
He's not particularly charismatic or inspiring in the slightest.