Yeah, I think the primary purpose in oil based sauces and garlic is to flavour the oil. I agree with those above who suggested making a paste if you want the actual bulk to stick in it- otherwise, you either need a different sauce OR a differently shaped pasta that will catch the garlic (bow-tie, or other lipped type pastas). Note that the amount of chopping and/or crushing you do directly effects the strength of garlic flavour/smell: likewise, the more you cook it, the more that strength is eased off, too. It's a chemical reaction issue- cutting or crushing garlic causes more of the compounds that make garlic so pungent and yet also flavourful.
This explains why some recipes call for you to peel the garlic but leave it whole, and saute it- others, ask you to crush the clove (often done by putting the flat of your chef's knife on it and smacking it firmly with the heel of your hand), others ask you to roughly chop it, others mince it, and... most strong of all... making it into a paste or using a garlic press, which yields the most. However, once you begin to cook it, this begins to moderate the spicey strength of garlic... the more you cook it, the less potent it gets, though as many will tell you, even though you can easily eat well roasted whole garlic cloves, you'd best get your companions to eat it as well if you do not want to drive them off. Where you breathe on them or not, it will be secreted through the pores of your skin!
So keep this in mind, if you use a garlic paste- you're going to get more "bang for your buck" so to speak, as opposed to chopped or finely chopped garlic, or even minced garlic.
Hope the extra details help!
-Coro