Observed it is not possible to include some transaction on some block, which doesn't really make sense.

Need to do proper benchmark and return the real weight.

https://github.com/paritytech/substrate/blob/c0793b58c509f352b6006e402350ac9ad8017823/frame/session/src/lib.rs#L571

https://github.com/paritytech/substrate/blob/c0793b58c509f352b6006e402350ac9ad8017823/frame/democracy/src/lib.rs#L1625-L1626