Since I work for a producer of STPP (the phosphate ingredient in detergents, usually not TSP) I can agree on the whole with this article. Governments around the world are banning phosphates from domestic detergents to prevent water eutrophication (algal blooms etc.). However, domestic applications account for no more than 2% of the problem, the remaining 98% come from human waste (crap) and agriculture (both phosphate fertilizer and animal waste).

It is therefore rather "symbolic politics" with politicians trying to get a "greener image" on this issue, rather than actually fixing the environment.

What's more, sewage treatment plants could also reclaim phosphate from wastewater and collect it to be recycled, this would close the cycle.

But this probably won't happen, right now governments are looking at banning STPP from automatic dishwasher detergents as well, and industrial and institutional cleaners are next. So you can expect a lot dirtier dishes soon as well.

For more information you can check out http://www.ceep-phosphates.org/ which is the European lobby for phosphate producers. They have some good background information on this.