I have only a few remarks
1. The buyer that purchases a homes first sees that home with a Realtor 90% of the time
2. Homes that sell in the first 30 days sell closest to asking price...at 120 days in my MLS they sell for 93.6% of asking....after some price reductions.
3. Depending on your situation (the number of homes with which you are competing). all things being equal, offering 1% more commission is less expensive than a 5% reduction in the sales price (I normally advise my sellers that if we don't have 10-12 offers within the two weeks, we will make a 5% adjustment in the price).
Realtors should show properties that meet their buyers' criteria, and not choose which properties to show based on the commission or the bonus offered. If realtors feel the commission is too low, they can negotiate with the seller ---- separately --- for a higher commission.
Again...if you're willing to give 1% of purchase price to anyone as a bonus, give it to your buyer instead. I'm sure the buyer's agent will be just as delighted to close the deal.