Thank you for that question. I'm glad you asked.
The concern here is for the financial well-being of our country. Once a majority population of a Democracy has figured out that they can just vote themsleves gifts from the coffers of the country, that country will certainly head down a swift path to financial ruin. That's why we don't have Democracy.
The founders of the United States fortunately were aware of this history, so they slowed this phenomonon down by deciding upon a Republic. By voting only for Representatives, the direct control of the coffers is taken away from the voters in favor of stability. But even a Republic's financial solvency can be threatened by a majority of politicians out-promising each other over how many gifts they will give people in order to get elected.
The fiscally conservative side of the voting block is very concerned that a number like 70% receiving direct payments could be the tipping point to create the phenomenon I've described above. That may or may not be the case, as many direct payments are for direct goods and services (e.g. Farm subsidies, federal payroll, etc.) But it is a concern that is something we as a country should watch closely and discuss.