The fact is only 0.66% of overall workforce get minimum wage, but 22.8% of working teens get minimum wage or lower [1]. Most of the people on minimum wage would be either teens or people just entering the workforce. Of course, there are point exceptions, but numbers say fifty years old working at min wage is a very uncommon occurrence, both among fifty-year-olds and among minimum wage earners.

[1] http://www.aei-ideas.org/2013/02/the-real-tragedy-is-that-ma...