The problem the contractors have is no one will ban together and put a stop to it all. They say got bills to pay so they keep doing it for the crap pay. Would you keep doing it if they lower it to $1.00 a foot - or even 50 cent a foot or even 10 cent a foot. You got bills to pay.
If some one trys to do the job(s) for low prices then well things can get bad for them. Things do happen at times to those that heed the warning. Seen it done before with labor disputes " strikes " picket lines. It is called coercion.
When are you going to put a stop to the low prices. Most of these if not all these prices are in the 1980's early 90's not 2018 prices.
Work at McDonalds get paid $15.00 for no experience and not have to use your own equipment gas insurance.
REMEMBER THE WORD COERCION. COERCION CAN DO A LOT TO SOME ONE.. When things happen by not heeding the warning, such as do not do the job