Where do you think they threw the grounds?
Either A) a compost heap or B) a landfill, neither one of which should see anything going into the ocean unless something's gone very wrong with the whole process. Assuming you dump your coffee grounds into a garbage disposal or flush them down your toilet or whatever asinine thing that still shouldn't lead to much of anything making it into the ocean unless we're dumping raw sewage into the Pacific now...
The harsh truth about old people is that supply exceeds demand. For example in the US there are now only about 2 workers paying into Social Security for each retiree, much lower than what was intended for the system to work.
The system would almost certainly have remained solvent while this structural issue sorted itself out (read:the baby boomers all died off) if the congress-critters were able to resist keeping their greedy little fingers out of it's fund for more than five minutes.
In any event though, anti-senescence research could actually fix this in the long term. If we can start eliminating the negative effects of aging people won't need to retire as early.
And pork projects (yes, schools have those too) as well.
Oh boy do they ever. The local school district is cutting everything they can and still in danger of going under for lack of funds. Part of that is because no one wants to raise property taxes but largely it's because every year or three for as long as I can remember they've basically been digging ditches just to fill them back in again. Repave a parking lot then almost immediately tear it up to build a new extension, destroy and remake 3 or 4 perfectly good tennis courts in less than a decade (despite not even having a tennis team), refurbishing the auditorium then tearing it down again. The fools couldn't waste more money if they were trying and then they wonder why no one wants to vote for a tax hike to pay for everything!
Of course, the ones to suffer are the kids. This district used to have all sorts of vocational training, an amazing arts department and one of the best music programs in the state. That's all getting cut, the combined district is merging with another and if the combined district manages to stay afloat for more than a few years it'll be a miracle...
One possible reason that things aren't going according to plan is that there never was a plan in the first place.