work as a garbage man also has pretty low entry barrier
What makes you think that? There is very little ad hoc freelance work in the business and contracts to collect refuse are very tightly controlled. I imagine that winning those contacts as a newly started one man garbage collection company is almost unheard of. As such the barriers to entry as a plumber are much much lower.
What makes you think that? There is very little ad hoc freelance work in the business and contracts to collect refuse are very tightly controlled. I imagine that winning those contacts as a newly started one man garbage collection company is almost unheard of. As such the barriers to entry as a plumber are much much lower.