NOTE: This was an unpublished draft that for one reason or another I did not publish on the date given. In order to clear out my draft folder on 12-16-2013 I chose to publish it. However, I won't vouch for the completeness or accuracy of it, and it most likely does not reflect my opinion anymore.
The thing I like about the Philadelphia city website is that seems to know about revenue and raising it. On the front page, near the top they provide an easy opportunity for you to pay them, be it for taxes, permits, or parking fines. It says, "Hi, you owe us money." Today it also seems to say, "Let us assist you on finding a job (so you can pay us our money)." DC however, I got to hunt to find out how much I still owe because my mortgage company didn't cover the tax bill.
As far as I can tell the DC government makes a good chunk of money off the value of my home and my income followed by sales taxes.