My own opinion is that in these two particular sentences, you can have either. My preference in the first sentence is certainly for the simple present, but I cannot think of any reason why the WILL form is wrong.

In the second sentence, both are logically possible, I think, but we are talking about the future, and that leads me to prefer the WILL form. However "as long as" refers, so to speak, to a series of continuing presents, if you get my meaning, and I can see that a present in the other half of the sentence does the same.