From the Center for the Center:
It’s really very simple. Legislation and tax policies which provide benefits to all citizens yield fewer votes, political contributions and favors to Democrats than “targeted” proposals.
The Democrat guiding principle is to divide us into groups, and then to threaten punishment to certain groups while offering rewards to others. This keeps the graft, votes and contributions flowing as the disfavored seek to avoid onerous “targeted” policies and the favored vote and pay to keep their “targeted” programs running.
Treating everyone the same under the law leaves no discretion for graft and corruption.