Kimberly Kindy is a government accountability reporter at The Washington Post.
The letter from farm, food safety and other groups asks President Obama to reject the proposal.
The Obama administration is seeking $4.7 billion for the Food and Drug Administration in its 2015 budget proposal.
In latest push, plant workers meet with lawmakers to share accounts of injuries caused at current speeds.
Payments are reflected in revised budgets for the Bureau of Indian Affairs and Indian Health Service.