Poop in my pants, Poop in my pants, feelin' like a fool with poop in my pants

So....the latest challenge we have faced in child rearing is a poop challenge with our four year old son. This boy has so much confidence in himself when it comes to things he feels is worthy of his time such as Godzilla, Legos, sports, etc. Why then does he insist he cant dress himself or wipe his own hind end? We have really been working with him to encourage him to dress himself (he will be five in three months mind you) as well as wipe himself. We are VERY slowly making progress. With the dressing, we have to threaten to send him to school in his night tshirt or PJs...more like a promise because we already have his preschool teacher on board and will do it if we have to. With the hind end issue, at first he would sit on the toilet and cry until we wiped him...we transitioned him into at least trying it but we had to be in the bathroom with him....now he will wipe but we have to come check him before he will pull up his pants and leave the bathroom. Now...he is pooping in his pants at school and not telling his teacher. Why? Well...in his words, "I don't like pooping at school! If I feel it coming I jump up and down to keep it from coming out. I don't want Ms Debbie to wipe me". What? You don't want your teacher to wipe you so you go in your pants and wear it! Gross...geez I don't get four year old logic! From the time he started potty training he has held it until he got home so he just likes to poop at home, like so many other people. In suppose his bowels have always cooperated with this schedule...until now!