Exchange Withdrawal Fees

I would like to see a commuity push for exchanges to improve their withdrawal fees for Bitcoin.

For example, last time I checked BitStamp was charging equivalent of $23 for a BTC withdrawal, but multiple output transactions regularly clear for a tenth of that. Kraken is better at around $7 but still not good enough.

Why can't we set a fee when we withdraw and take responsibility ourselves for how long it takes to get confirmed ?

Does such profiteering from withdrawal fees not strike you all as completely contrary to the ethos of Bitcoin ?

If we tolerate these levels of charges, there is little chance of them being motivated to implement even small withdrawals over lightning.