Why not scrap military pensions, and pay more money to military people?

My idea is that after a 6 to 8 year length of service, military personel get a hefty raise, and a government guarenteed retirement plan, that they invest in themselves, such as the Thrift Savings Plan. They could invest up to 50% of their pay. Also, not have a mandatory retirement time in service, but mandatory age 60 for anyone under E-7, under O-4, and WO's with no required retirement. For those with service connected disability, a Tri-Care plan and Veterans Administration Health Plan, and Tri-Care/ any military medical facility, at age 60 (Tri-care to include full Medical, Dental, and Vission, Veterans Administration for Service connected).
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I'm not sure if I like your pay idea or not, but making the minimum age for retirement sixty would not work for several reasons. First, the military is all about promotion of experienced, skilled members. If there were people waiting an extra twenty to thirty years to get out, not only would promotion rates drop incredibly low, you would have people stuck in positions where they are overqualified simply because their rank would not let them go any higher. Here I am thinking mostly enlisted, although I can't see that the officers would be happy about a lower promotion rate, either. Second, the military needs fit, healthy members to be the majority, not half or the minority. It is a sad fact that our bodies decay as we get older. That is why you do not generally see a military member over the age of 50 to 55. Such people are the exception, not the rule. The military is physically demanding, and the human body tends to start breaking down under such treatment long before 30, let alone 60! There are many more medical problems associated with advancing age, as well, such as heart and lung conditions, frail bones, and failing eyesight (which cannot be corrected with laser surgery all of the time, and especially as you get older). ANY one of any age should be able to receive medical benefits from the military--amputees, those with the seemingly inevitable knee problems (my right one is starting to act up recently), hearing problems, eyesight issues from starting at computer screens day in and day out. There are any number of physical side affects that can be directly attributed, with proof, to military service, and you shouldn't have to wait until you're 60 to be compensated for giving up good physical health in service to your country.
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