[SIP-30] - Emission Reductions by Utilizing Idle POL m.USDC on Metis

For reference:

State of the Treasury : https://synapse-treasury-frontend.vercel.app/ Monthly Syn emissions : https://synapseemissionsdashboard-3d76b3202ae7.herokuapp.com/

Overview:

Following the path set by prior tokenomics improvements proposals to reduce SYN emissions, I am proposing that we use idle stablecoins sitting in our Metis treasury to populate some of the Synapse stablecoin liquidity pools, for the rental of which we are currently paying for with SYN. The objective is to lower protocol costs while having predictable liquidity available in some of our most used pools.

Implementation:

1. Move 1/3 of m.USDC to the Canto nUSD pool and take emissions to zero on the pool
2. Move the remaining 2/3 of m.USDC liquidity to Optimism and cut emissions in half
3. Reduce emissions by 1/4th on the Polygon pools

Parameters:

1. To avoid negative slippage, first consolidate the USDC stablecoins on mainnet by the use of the Metis native bridge
2. Aim to have Implementation executed within two weeks after passed proposal