imo:

1.  Eliminating staking for small stakeholders also eliminates their desire to use and support Tek.  (Consider them as potential users, instead of stakeholders.)  Unless Tek is used for something other than increasing stakeholder holdings, it will die ... as many other coins did which had no actual real-world usage.

2.  Any coin should treat all users the same.

3.  Tek cannot continue increasing the supply without bounds, or very soon -- at 10% or 40% -- there is infinite supply and zero value.

Basing the stake rate on the coin supply deals with all these issues.  Everybody stakes, everybody is treated the same, and the coin supply cannot increase to a point where the coin has zero value.