Incentive to lock liquidity

The upcoming vote for a withdraw limit made me think.

It would be good for the system if we had an incentive for people to block Ther liquidity for a set amount of time.

The best option would be the vires apy.
Give people the option to lock Ther supply for say one Monty and in that time they get a bonus apy in vires .
Meybe make it dependent of the utilisation of set asset.
So if I lock at 100% utilisation i get +10% vires apy
And at 50% i get 1% ore something.