After the submission of [referendum 112](https://polkadot.subsquare.io/democracy/referendum/112), seeking to increase the validator active set to 500, the community discussed the possibility and the need of Polkadot increasing the validators set. 

Feedback from the proposals indicates two points:

- There's interest with increasing the number of validators of the active set **but with increments**;

- There needs to be some analysis on the effects of the increase to ensure there's no security concerns.

The results indicate that participating members would like to increase the active set to 400 with increments of 5 per era. They believe that this increase would not compromise the security of the chain and allow for natural (opportunistic) leveling as the set increases. Core developers have also agreed on similar increases by value: 

“With increasing to 500, the amount of DOT needed to acquire a validator will sharply reduce from 1.7 mDOT now, to just around 370 kDOT. We think this is overall unavoidable, but we would personally suggest first increasing to 400 and re-evaluate”

This proposal aims to increase the active set of validators by 5 per era, for 20 eras. The call also executes a one-time increase by 3 to reach 400 validators by the end of the 20 eras. Note that this initiative is submitted on behalf of a coalition of 1kvP validators.

- Preimage Hash: `0xbacad43f5467717cb1edfba6317524dc1d24fe3246afbe6a8cea7ed5fae1ba5f`
- Call data: [HERE](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fpolkadot-rpc.dwellir.com#/extrinsics/decode/0x1a0408070a0c010401000000014038000014000000fe070a14)

Please note this proposal is submitted as an external motion: meaning if/after Council approves, the community will vote in referenda queue for the final decision. 

Make sure to review and vote!

Schedule the currently externally-proposed majority-carries referendum to be tabled
immediately. If there is no externally-proposed referendum currently, or if there is one
but it is not a majority-carries referendum then it fails.

The dispatch of this call must be `FastTrackOrigin`.

- `proposal_hash`: The hash of the current external proposal.
- `voting_period`: The period that is allowed for voting on this proposal. Increased to
	Must be always greater than zero.
	For `FastTrackOrigin` must be equal or greater than `FastTrackVotingPeriod`.
- `delay`: The number of block after voting has ended in approval and this should be
  enacted. This doesn't have a minimum amount.

Emits `Started`.

Weight: `O(1)`

Send a batch of dispatch calls.
Unlike `batch`, it allows errors and won't interrupt.

May be called from any origin except `None`.

- `calls`: The calls to be dispatched from the same origin. The number of call must not
  exceed the constant: `batched_calls_limit` (available in constant metadata).

If origin is root then the calls are dispatch without checking origin filter. (This
includes bypassing `frame_system::Config::BaseCallFilter`).

# <weight>
- Complexity: O(C) where C is the number of calls to be batched.
# </weight>

- The community wants to increase the number of validators in Polkadot.
- They want to increase the active set to 400 with increments of 5 per era.
- The increase will not compromise the security of the chain.
- The proposal is submitted by a coalition of validators.
- The final decision will be made through a community vote.

#91 1kvP Validators Initiative: Increase Validators Active Set to 400