"It sounds to me" , from reading this thread that plain and simple some of his previous "employees/subs" just have not seen the fruits of their labor, but somebody else has.
Bottom line is if you hire somebody to perform a task and they answer only to you and nobody else, then you and only you are responsible for seeing they get paid in a timely fashion.
If you have to get money from the client to trickle it down to your employees than you are simply a middleman and not a contractor.
Operating a "legitimate" business where the business relies upon the labor of people other than the proprieter of said business in order to turn a profit needs to have venture capital to fuel that business untill it reaches the point where it is recieving monetary justs.
Being a business owner that relies upon employees is sort of like starting a new job and you have to pay for gas out of pocket to get to that job untill you see your first paycheck. The employees are your vehicle to profit. And one needs to put fuel in that vehicle in order for it to go anywhere. No fuel, no motion. And then your stuck out on the road with one thumb in the air, and the other thumb shoved up where the sun just doesnt shine.
If your asking your employees to take risk than they are not your employees, they are your partners and should be paid and rewarded as such.