Maybe at the very top when you have more money than you’ll ever need, but for the vast majority of people jobs aren’t truly voluntary.
Yes, jobs are voluntary. The vast majority of people could choose not to have a job and not to entertain certain luxuries in life like having a roof over one's head or food on the table. Some even (voluntarily!) choose not to have a roof over their head because they don't like the idea of having a job.
Taking job A over job B could be described as voluntary but saying that you could just be homeless and scrounge food, especially in locations where the local government makes this illegal, so working is voluntary is just wrong
One can still choose to disobey the local government and be homeless. I'm not saying it's an easy choice, nor am I saying it's easy to be homeless. I'm just saying it's a choice.
Food and a roof are basics, not a luxury. The fact that a significant number of people in this world don’t have those things speaks more to our failure to provide.
Do better.
It still is a choice whether one chooses to work, as evidenced by those who chose not to.
Edit: the "luxuries" was slightly tongue in cheek and perhaps didn't land well. Anyway, you're free to move to the wilderness, hunt/grow your own food, build your own shelter, and do without the socio-economic system altogether.
Voluntary is not binary. If someone put a gun to your head and told you to eat shit you technically have a choice but it's not much of choice is it?