Of coursethe Republicansthe government can destroy Social Security, it is a government program. How many Presidents have raided it? Any of them Democrats?
And it is already means tested. There isn’t a straight percentage paid out based on income. SS pays out 42% of a $60,000 salary but only 26% of a $120,000 salary. Obviously it is taking income into consideration vis a vis life needs. It also pays reduced benefits if you are working a job (i.e. have other forms of income) at certain times of benefit eligibility.