someone who chooses to have a hourly/tip job over a salary job is choosing to work a specific time/times for specific pay plus the incentive of maybe getting extra money. a salaried position guarantees unlimited availability. the hourly choice might be made due to other obligations such as familial responsibilities, commitments to another job, or higher learbing. an hourly position might be best for them as their financial obligations vary from day to day.
I left typos and used weird word usage so that you can use this to make your own paragraph.