Answer:
I am higher than the king
First I may be your servant's name; then your desires I may proclaim; And when your mortal life is over hold all your wealth within my power.
If a man carries my burden they will get crushed to death. Though not rich I leave silver in my track.
Send poorly behaved children to me and let them sit here. What am I?
I always go to bed with my shoes on. What am I?
No matter how little or how much you use me, you change me every month.