Currently the inflation caused by the collation system is 5% per year. Originally 5% inflation were proposed as the absolute maximum for all systems that cause inflation. Furthermore, the high inflation negatively affects the price, while overpaying collators (at the current price of $0.09 about 300$ / month) and delegators (20% APR).
This proposal aims to reduce the total inflation caused by the collation system to 1.5% per year, effectively reducing the excepted monthly revenue per collator to $85 (at a ZTG price of $0.09) and the average delegator APR to 6%. Collators should easily stay profitable with this revenue, especially when considering that the hardware requirements for the Zeitgeist parachain node are very low when an external relaychain node is used. 6% delegator rewards are also reasonable considering staking APR other parachains offer.
Some of the gained inflation potential will be utilized for the Court system, which is activated on mainnet in approximately one week.
More information in regards to the rationale and calculation of the inflation parameters can be found at <a title="Collator System Inflation Document" href="https://hackmd.io/@lZVVinJVS6WI4IpRgmbsLA/BygeToqf3" target="_blank" rel="noopener">Collator System Inflation Document</a>

Schedule a negative-turnout-bias referendum to be tabled next once it is legal to
schedule an external referendum.

The dispatch of this call must be `ExternalDefaultOrigin`.

- `proposal_hash`: The preimage hash of the proposal.

Unlike `external_propose`, blacklisting has no effect on this and it may replace a
pre-scheduled `external_propose` call.

Weight: `O(1)`

Set the annual inflation rate to derive per-round inflation

Problem Statement:
- The current inflation caused by the collation system is 5% per year, which is higher than the proposed maximum of 5% for all systems causing inflation.

Significance:
- High inflation negatively affects the price and overpays collators and delegators.

Proposed Solution:
- Reduce the total inflation caused by the collation system to 1.5% per year, resulting in lower monthly revenue for collators and lower delegator APR.

Expected Outcomes:
- Monthly revenue per collator reduced to $85 and average delegator APR reduced to 6%.
- Some of the gained inflation potential will be utilized for the Court system.

#40 Set yearly inflation caused by the collation system to 1.5%