I am of the opinion that low wage jobs are a form of UBI. In this manner, individuals are paid a basic income in exchange for their productivity. However, these jobs are not meant to create wealth. They're meant to provide subsistance. This is much the same goal of UBI.
For those that say that benefits (health, retirement, sick pay, family leave, vacation) are necessary in addition to low wage income which often does not supply many or any of these benefits, I would say that is the case for UBI as well.
For UBI to work, there must be a base of benefits to support the UBI. As such, I see UBI and low wage as fairly synonymous except that UBI is seen as providing income without any productivity required of the individual, and low wage being UBI with required productivity.
In many ways UBI and low wage work come at odds. The more that UBI is offered, the less that individuals would want to do low wage work. Rather than pushing up wages for low wage work, dis-incentivization of low wage will push employers towards automation. As such, low wage is a support of employment generally. The more that employers move towards automation, the more that low wage jobs are eliminated, the more that UBI becomes the only alternative to low wage. As such, low wage jobs do provide a necessary function in the economic system.
This is just food for thought.