I have DD 20 and she has a bunch of friends from 17-around 23 years of age. They all work or want to work. My DD usually works part time, she has applied for about 12 jobs this week alone and babysits to supplement her income, while studying full time.
There are some reasons why people may refuse jobs. One woman I know was working but it wasn't enough hours, so they tried to make her take another job, longer hours, that actually made less money then the first job. And were going to penalise her for saying no.
Some people don't have transport or support systems where jobs are offered.
All it will do is force people to take low paid jobs, keep in poverty and working for less money. Companies will live it, bosses will live it.