Yeah, that's very correct. Whenever you have applied for a job in any company, you're coming out to accept whatever work responsibility they are going to be giving you. Having them taken care of is what makes the company liable to pay you either by hourly, weekly, bi-weekly or monthly basis.
Yes, it's how I'm expected to work in the company where I'm under working contract. If I don't do the job which they have employed me for, I'm asking them to sack me because when I don't work, the company is not making money from my own job.