The obvious solution to the callers concern is to build more desalination plants, that way we will be pumping the resulting brine back into the ocean to replace the salt removed for consumption. The end result is that Gaia will be back in balance, which is more than can be said for the callers mind.
There is another obvious solution to the caller’s point...
If there is too much salt in the ocean, it should be taxed. Will help with the deficit.
If the ocean’s salt is starting to deplete, it should be subsidized. A bit more Monetary Easing will go a long way to paying for this.
If you think this is going to break the budget, then, to make up for the above... we should also tax de-salinized water, and subsidize too salty water.
No new legislation would be required to do the above, since the EPA rules on the waters of the earth.