1) When someone joins the Army (and any country for that matter), they join out of sheer patriotism to fight against the enemy and safeguard its people. These soldiers very well know that they may have to sacrifice their lives for the country. But since when, their patriotism should be used as an excuse to overtake a running democratic system or use force and put marshal laws in?
A boxer isn't trained to do public speaking. If he did try to learn it, he may not be good at it. Public speakers are entirely different category and they spend majority of their lives in academic institutions. Different skill-set altogether. Similarly, a military man, even with his utmost patriotism, isn't designed and trained to rule the country in today's age. Civilians do that. The boxer (soldier in this case) knows how to fight. He'll be doing just that when he needs to instead talk to his enemy diplomatically. But he might start another issue when a democratic civilian would've reduced the tensions to normal.
2) Your logic about public services people making money doesn't make sense. If money is the objective, than don't join the military to be a patriot. You join public sector instead to be rich. Don't create short cuts for a soldier to make money. That'll be through the marshal laws, kick backs and through coupes, which is like breaking the constitutions.
3) If there wasn't military's intervention in Pakistan, Pakistan would've been to a place in early 80's where it is finally headed now with NS's team bringing huge projects and billions of investments. Imagine if this work was going on in the 80's, today, Pakistan would be lists in the top 10 economies!! Unfortunately, it was the military that took over and the progress stopped. Internally, due to the fear, the security situation gets better during the military rule but everything else, international trade and relations go down the hill. Musharraf was given billions for Pakistan so please don't tell me like was great in his time. It should be a thank you to the American tax payers like myself.
4) The only thing Musharraf now needs to do, is to accept old age. Same for IK, Zardri, and same for NS after this term. Let the new talent come up.