People have a right to support candidates > they can print a sign and stand on a street corner > printing signs costs money > people have a right to spend money supporting candidates.
People have a right to assemble > they can stand on a street corner with their friends > they can hold a big sign together > they can have lots of friends and form a group and print a really big sign.
We want to encourage private business > limiting liability for owners who do not participate in the business would increase access to capital > we offer corporate forms that shield investors from liability > identity of owners may be kept confidential.
People complain about the wrong thing. The problem isn't that people are allowed to support candidates with their money, buy airtime, etc.. It's that companies have secret owners...