RE: If I am a millionaire: Would I still work?

out of fear to drop below their current state of hierarchy

OMG! Yeah I can totally imagine that. Once you have some level of comfort it must hurt to lose it.

Even while we desire rest, it's for a short time

Perhaps it's not so much about resting, but about doing nothing, becoming stagnant. Because an important part is resting properly in order to continue giving your best.