I do have to agree on some points here.. especially the streamlining of menu's that I have noticed to some extent and a reduction of portion size at many restaurants as well.
However I can't be as quick to just blame it all on the DDP as you are. Taking into account rising fuel costs, increased supply costs, increased utilities cost, wage increases, development costs, renovations.... it's impossible to clearly state that the DDP is causing the issue's with the restaurants. There have been cost cutting measure's all around WDW in the recent years. This is just a harsh reality of the world we live in now. Is the DDP to blame for the reduction of christmas decorations? Or the removal of the free picture's from
MVMCP? Or the increase in park ticket prices?
While yes it can be argued (and it has been repeatedly) that the DDP is causing some restaurants to become homogenized, there are still clearly excellent dining options available outside of the DDP that have been pointed out. V&A's, BlueZoo, Bistro De Paris and Many DtD restaurants are good examples of these options.
The DDP possibly could be causing a declining level of service (although in my experience, the server's couldn't have been nicer), but for a slightly different reason. There is no debate that wait staff receive a 18% gratuity when a customer uses the DDP. Here is the problem: Tips are supposed to be provided in accordance with the level of service received. If someone knows they are going to get 18% reguardless of whether or not they provide great/good/bad/horrible service, some will probably decide it is not worth the effort to go that extra mile for a better tip.
Also, usually cash tips at restaurants are not reported to the IRS by servers and ends up being untaxed, while all credit card tips (at most places, I can not speak for every restaurant in the world obviously) are usually tallied up and provided to the employee as a paycheck. Server's generally also make $2.00/hr or so, and all tax is witheld from that check. So the DDP is probably causing server's to have to have a substantially larger amount witheld on the part of taxes than they are used to. With that being said however it is still hard to fathom that they are "losing money" by any means since generally, a server will not receive a 18% tip from every customer. Also customer's on the DDP tend to order more expensive meals since they are choosing an appetizer, entree, dessert, drinks, and in some cases alcoholic drinks as well. This will also lead to a much larger tip amount for the wait staff. I have a hard time saying that the DDP is solely causing bad service but it may be a contributing factor.
As for the last part of your tirade... I will only say this: You can not blame people for taking advantage of a program that was implemented by Disney to provide an affordable alternative to paying cash for each meal. Blame Disney, not the people who use the DDP for the program. You should be thankful that you have the CHOICE to be able to say, "I don't think I will support this program and pay cash for my meals." That single mother with 3 kids who is going to WDW for possibly the one chance in 20 years should not be insulted for attempting to make their vacation a little more affordable by trying to save some money on dining. No more on that I don't want the topic to be closed because of me...
There are lots of factors that are causing these issue's and not just the DDP... I mean Year of a Million Dreams (while being a great promotion) has to be costing Disney alot more than the DDP is...