Parking mad

One of my pet dislikes is disabled parking. All those long rows of parking spaces at supermarkets that are meant for the disabled, or parents with children. Don't get me wrong, I have absolutely nothing against parking spaces being reserved for the disabled, but it simply doesn't make sense that they should have three or four regular parking rows marked exclusively for their use. Especially as I've only ever seen the first few spaces in use. 

Regular rows are usually quite long, so why force those in wheelchairs or on crutches to navigate all the way from the far end to get to the supermarket entrance - assuming always that there are enough of them at any one time to use up entire rows of disabled parking spaces? Wouldn't it be more sensible to make, say, the first five spaces on every row that is close to the entrance extra-wide to accommodate the disabled-with-wheelchairs or parents-with-children? That way they would have plenty of spaces conveniently close, and the remaining spaces in the rows could be used by the non-disabled customers. It makes sense to me. How come nobody has considered this? Or am I missing something?