The following sentence doesn't seem to read well on its own. "Our commitment is to improving the quality of life". Does anyone know if it is just me, or is there a grammatical issue?

' Our commitment is about improving the quality of life 'Emotion: smile

' Our commitment is to improve the quality of life 'Emotion: smile
I think that the sentence is correct. You can be committed both to do something and to doing something. In the first case 'to' marks the infinitive and in the second case it is a preposition.
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No, I have to agree with WHL here. "Our commitment is to improving the quality of life" does not read correctly. It should be "to improve", not "to improving".

It is perfectly okay to say: "We are committed to improving...". Here, the person or thing which is committed is "we", which makes perfect sence. But in the original sentence the subject is "Our commitment", not "we", and "Our commitment" cannot be "to improving" - it doesn't make sense.

London Hydro has as its slogan "Our commitment is to our customers." Is this correct? If it is, what is the difference between "Our commitment is to " and "Our commitment is to "?
"Our commitment is to our customers" sounds okay.

I would say that the "commitment" part is fairly irrelevant. We can be more general than that. In general, I don't think "to " would be correct anywhere. (With some exceptions of course, as this is English. See below.)

I mean, if you've got a gerund, then you've got a noun describing an action. That doesn't sit well with the preposition "to", which implies direction or motion or relation. I can think of some esoteric uses. Phrases like "He went from running to jumping" makes sense, for example. But a gerund isn't usually a destination.

So it's not really a distinction between "to " and "to ", because a gerund is a noun, syntactically at least. It's more a distinction between what makes sense and what doesn't. To make sense after "to" (the preposition) the noun would have to be a destination of some kind. To other use of "to" (marking the infinitive) obviously requires an infinitive, not a gerund.

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There are two types of sentence structure here.

1. Our commitment is to .....

2. We are committed to .....

For the 1.

After the verb to be ' is ' is supposed to be a noun, so ' to improve ' fits in well. Since ' to + infinitive ' form a noun phrase.

For the 2.

" to " is a preposition, so it is supposed to be followed by a noun, but ' improve ' is a verb, so to turn it into a noun. We add ing to it to make it a gerund and gerund is a noun in action. So it will become

eg. We are committed to improving.....Emotion: smile