Straight up, the senior enlisted member (or Officer) of any service, let alone the USMC which has been in the thick of OEF/OIF over the last decade, should not go before Congress and testify that 'we never had it so good' and 'lower pay will add to discipline.' That is deplorable. His job is to advocate for enlisted Marines and he's not doing that by offering no resistance toward a reduction in pay, even if that reduction comes in the form of allowing inflation to overtake annual CPI raises. It's like going to the car dealership and saying "yea, this car is a great value for the sticker price," except he's doing it with hundreds of thousands of people's paychecks.
If you want to talk about misleading, calculators that say an E-3 'makes' over $1,000/mo for living in the barracks when a shared studio apartment + utilities could be had for $300-400, and then adding a tax advantage into that, is misleading. In reality, the number is closer to $30-32k, which is about $15/hour if they worked a 40 hour work week. And we all know that they work many more hours than that. All this really is is 'me-too' ism: Some guy can't find a decent paying job after wasting his college education getting C's and smoking weed, so he points to people who make a living doing something that he might not agree with or might not be willing to do, ergo they are overpaid.
EDIT: Also, where is this mythical new equipment that people keep quoting that will make everyone's life easier? That's right, it's an empty promise. What they're really doing is trimming pay to subsidize the cost of bad contracts; they're not going to actually acquire better equipment such as shipboard laptops that cost under $1,000 and can boot in under 10 minutes.