I think the coronavirus has proven this to be false. Many of the so called "essential jobs" are low paid, but the "essential" label is an acknowledgement of their high value to society.
This is similar to the price of water. Yes water is essential but it is readily available and so the price is low. Same for many essential jobs. Turns out a lot of the work necessary to keep civilization ticking is menial and requires no specialization. This is not a statement of the value of the workers (though indirectly it unfortunately often is), only the work they they provide.
They are low paid because in most times anyone can and would be willing to do them. Now, no one wants to do them, so pay will increase if the lockdowns continue.
