No, you work to the job spec and contract if you don't feel you're paid to go "above and beyond".
I once took a massive pay cut for a lower level job when I first got married as I wanted to work close to home (rather than a 90 minute commute) and wanted regular 9-5 hours instead of the occasional weekend, overnighter, evening meetings, etc. We're talking a pay cut of over 50% from a directorship level job (management etc) to a "number crunching" auditor.
It suited me. I could do the job standing on my head, with my arms tied behind my back and my eyes blindfolded. Go to walk, do a solid 8 hour day, come home again, no stress, no pressure, etc.
They tried to "scope creep" by trying to put me on audit jobs as the audit manager rather than a lower tier audit assistant. They tried to put me on assignments miles away requiring long daily commutes or overnight accommodation. I simply refused, and referred them back to my covering letter for the job application and the contract of employment. I'd made it clear at application and interview I wanted an "easy" 9-5 job close to home, I'd made it clear that was why I was prepared to take a whopping pay cut and drop down several levels of seniority and management etc.
Just because "I could" manage an audit didn't mean I had to manage an audit on the pay of a lower level auditor, They got the message! Once they realised they couldn't "scope-creep" me, they started offering a better job/package which I refused, again referring them back to why I was there in the first place, and eventually we just all accepted I was what I was and I spent a relatively happy few years there. I was happy, and they were happy (ish) as I was giving 100% for the job I was paid for and had been appointed to do. I was a dream for the audit managers I was working on jobs for as they didn't have to supervise, manage nor train me as I knew the job probably better than they did, I just didn't want the stress of the management/supervision side of things nor commuting or overnight stays.
They got the message in the end! It's hard to not go "over and above" in a role that you know inside out and beyond, but for me, it was easier because I had other reasons for not wanting a stressful job, i.e. new marriage, new home, and wanting a healthier lifestyle, so I could find the headspace to do the role and not get involved in things beyond it.