Do you believe our military are well paid?

I was just shopping at Walgreens and noticed a sign that if you can choose to buy peanut butter reeses for donation for the military. I asked the young lady how it worked. She told me it was for snack packages for troop members when they arrived home.
As I was picking some up to donate a lady behind the man behind me made an uncalled for comment. She said she wasn’t going to buy any because the military get paid well enough.
I was going to say something but then it would’ve gotten ugly. I’ve noticed over the years that there are many people who seem to believe this to be true.
However the one thing I found discusting was that it had nothing to do with how well they are paid. Its simply a nice gesture to welcome them home.
Should I have said something or was I right to keep the peace?
Why do people assume that military members are rolling in dough?