Dish already offers a la carte, and it ain't pretty.
Commercial accounts ONLY have a la carte options. But, the way the content is contracted, it isn't true per-channel a la carte. They are grouped mostly by content owner, not by theme. (Although, there is occasional mixing, depending on pack.) So, even though they have a News package for $12/mo, it doesn't include CNN or FNC. For those two channels, you'd need to sub to the Turner package (Variety B) and the Fox package (Variety C) for $12 each. So, in order to get all three major news channels, you would need to spend $36. That is in addition to the $20 Core package, which only includes locals plus shopping/religious/PI. So, now we are up to $56/mo without any sports or general cable stuff.
You want the Viacom channels? That's the Entertainment pack for $12/mo. The Discovery-owned channels? $12 for the Learning pack. The Comcast/NBC channels. They're split into two packs, Lifestyle and Variety A for $12ea of $24 for both. Non-premium Movies? $12 Kids pack? $12. Premium channels are additional. of course.
Sports? Those prices are insane. Although, these are commercial account prices, which take into account that the sporting events will most likely be viewed by large groups in sports bars and such, where this programming is used to produce revenue for the subscriber. But, it still gives you an idea of how much ESPN adds to our residential bills. The ESPN pack, consisting of ESPN, 2, Classic, New and U is $20 per month by itself. CBS Sports and NBC Sports are in two different Sports packs A & B for $12 each. (The former is arguably more desirable, as it includes the league channels, MLB, NFL, etc.) Many RSN's are at an add'l $12/mo, as well!
Now, a lot of this ridiculous pricing has to do with Dish, and the way they've chosen to sell these packages. But, the basic issue of channels needing to be grouped together by content owner, with many unwanted channels still required, is the fault of the content owners and their insistence on requiring carriage less desirable channels bundled with their popular ones.