That's a pretty broad generalization. I'm actually working on building a business on the side of my work, but I do my job. I focus on my own thing when I'm not at work. I also get my work done, and take time to test it.
There will in theory come a time when my side efforts will require effort enough to get in the way of my regular job, which is in fact the goal, but I have the integrity to face that -- and when I reach that stage, I'll leave the regular job.
If you're running a small business where everyone working for you has to put in 80-hour weeks in order to keep up with their work, then the fault is yours for your poor management -- though to be honest, I'd never consider working for you just because of your attitude toward your ownership of me.
Get it straight: you don't own your employees, period. What they do when they're on the clock is your business. Everything else is not. If you can't get that through your head, you shouldn't be attempting to run a business that requires employees. That's not an opinion, it's actually law -- don't forget, we abolished slavery.