From the article, "the agency had cast such a broad surveillance net that large volumes of innocuous First Amendment-protected activity regularly got swept up as potential security threats." This is funded by unlimited federal deficit spending. Let's reduce their budgets.
If you want to stop this kind of surveillance, your best bet is to advocate that it be illegal, with accountability. You can also advocate for a reduced budget, but it's not going to get you very far. If anything, it would tend to lead to more use of this kind of tool.
[0]- There are some agitators on the fringes of both parties for specific reductions to parts of law enforcement that those agitators have a problem with. Whether correct or not, the fact is that these are two disjoint proposals from elements that have no interest in compromising with each other. Neither proposal covers the U.S. Marshals, and neither is going to amount to anything at the federal level.