Do you have a source for this? I believe you, but there are multiple ways of parsing that sentence, and a source would clarify things.
One reading (87% of gross income) is obviously problematic, and another (87% of profit) is exactly what you'd expect to get if you add almost any subsidy to a previously low-margin activity.
We should have a universal subsidy, not preferential subsidy for some food groups.
For instance, 87 cents of every dollar that a dairy farmer makes is from subsidy. That is ridiculous.