There were certainly latifundia in Campania. That's not at issue. The problem is that leased smallholdings (i.e., "peasant" farms) were also very common in Campania, much more so than the large villas (for a review of the archaeological evidence, see N. Rosenstein's "Rome at War".
For an on-line review of the legislation, see Public Lands and Agrarian Laws of the Roman Republic:
Cicero, in his second speech upon the land bill of Rullus, when speaking of the consequences that would follow its enactment, declared that if the Campanian cultivators were ejected they would have no place
to go, and he truly says that such a measure would not be a settlement of plebeians upon the land, but an ejection and expulsion of them from it.
Did it pay to send out a swarm of 100,000 idle paupers who, for two generations, had been fed at the public charge from the corn-bins of Rome, simply in order that a like number of honest peasants, who had been not
only self-supporting but had paid a large part of the Roman revenue, should be compelled to sacrifice their goods in a glutted market and become debauched and idle?
Writing on the lex Iulia agraria Campania, Long wrote:
"This monstrous, this abominable crime was committed to serve a party purpose; and the criminal was a Roman consul ... too intelligent not to know what he was doing, and unscrupulous enough to do anything that would serve his own ends."
What a friend of the dispossessed was Caesar, who dispossessed so many! If I were a populare (which I'm not), I'd say, "No wonder Caesar had so many nobiles on his side!"