SSD size

You aren't asking Apple here, and we can't guess Apple's policy.

http://www.apple.com/feedback allows you to give feedback of unsolicited ideas to Apple directly.

Note: http://www.apple.com/macbook/specs/ shows that the MacBook has 256 GB and 512 GB PCIe SSDs.

128 GB and 256 GB is available on the Air:

https://www.apple.com/macbook-air/specs.html

https://www.apple.com/macbook-pro/specs/

shows the 13" model of the Pro has optional SSDs of 128 GB to 512 GB, and a standard hard drive of 1 TB.

The Retina 13" model can go the same way, and the 15" model has 256 GB or 512 GB:

http://www.apple.com/macbook-pro/specs-retina/

There is not a single model that only has 128 GB available. If you find there is an Apple Authorized place that only offers the 128 GB of any of these models, please call AppleCare and inform them the dealer in question is limited in its stock:

http://www.apple.com/contact/phone_contacts.html

It would really help if you read the spec before starting to rant against them.

You might look much less foolish that way.

128 GB and 256 GB is available on the Air:

shows the 13" model of the Pro has optional SSDs of 128 GB to 512 GB,

Actually, the MacBook Airs can be ordered with 512 GBs and the MacBook Pros with 1 TB SSDs.

You need to click on the "Buy" button to see it, the option is a build to order option.

What is your country?

Example for Malaysia:

The build to orders are shipped from China, don't see how they wouldn't be available.