Should welfare be a disqualification for voting?
Should corporations that receive government contracts, tax breaks, subsidies, bailouts, and favorable loans be barred from donating to political action committees?
Should public employee unions be allowed to donate to political action committees?
Do all of these amount to a conflict of interest with the American taxpayer?
Absolutely not.
I understand why it's tempting, to those of us opposed to the welfare state, but if we go down the path of limiting people's rights based on the government services they use - well, that seems like a dangerous slope. No matter how unfair or ill-conceived we might consider the services being rendered.
This is a similar issue to the idea of limiting welfare-recipients privacy rights (re: drug-testing) as a precondition of receiving of receiving benefits. Just seems like a bad idea to me, especially as more and more of the things we need are being tagged as government responsibility. If we go down this route we might some day be faced with forfeiting various rights to receive health care, for example.