Students of calculus or physics know about position and velocity. Velocity is the rate of change of position.
If you have wealth, then where are you going? If you lack, then you move, there is velocity to you. But if you are perfectly satisfied, you don't move. You have no velocity, and so you lack lacking.
If you are perfectly wealthy, you are not attracted to anything or anyone. You are alone on a deeper level.
It matters that you are attracted to something or someone, and it matters to what or to whom you are attracted. Desire is a lack, and part of love is desire, so in order to love, you must be somewhat poor.
Are you poor, or is poverty ruling over you? If you don't eat for 10 hours, is it you who become hungry, or just your stomach? But it is possible for you, the real you, to be oriented toward something, to be attracted, to lack.