You have to understand several things first.
1. Your pay and salary will not rise further if your ranking
grade does not change. Because your role and job scope has not
changed so why do the company want to pay you more for the same
thing you do everyday. Especially when you are working for more
than 5 years now. Your basic salary will be stagnated, even
the company is doing well. The thing that you may benefit is the
bonus that they give you.
2. You will be not promoted further if your education level does
not changed. For every grading, there is this minimum
education qualification. Meaning, if you want to rise up to
eg: "senior engineer", you need this Bach. Degree Cert, you must
have this cert. If the new grading, need Master, PhD, MBA, you
must have this
cert. Else you will never be promoted further.
I am sad to tell you, since you have claimed yourself to be
henchmen (blue collar guys), there is no way the "other" company is
going to pay you more either. In another word, they all pay the
same for henchmen.
You may want to change another company, (cose it is closer to
your house, doing well, or other reasons). But to go for higher
pay, you must either upgrade your cert or switch job.
Do not quit your current job until you have found another.