The easiest way out of this is actually also a very good policy.
Sometimes HCEs are merely the top 20% of a company's earners. Large sales forces can hit this because their support staff put them all into the top 20%. However, you can reduce the difference between yourself and the rest of the staff by getting them involved, and the best way to do that is to talk to your HR about having the "default" enrollment on the 401k include a contribution percentage. All too often, the default enrollment is 0%.
If everybody is enrolled, the cap on your contributions goes up, and everybody saves money.
I'm arbitrarily capped at 10% - in my case, HR kicked the can down the road until I stopped asking. Oh well.