Headline leaves out this important distinction:

In Sri Lanka, a lawmaker was previously entitled to a pension after serving a five-year term. The new law stops payments to anyone who already receives, or qualifies for, the pension.

The pensions being scrapped those that are only received by elected politicians (or sometimes their widows). There is no scrapping of general government pensions for regular people with this action.

I don’t really see the point. Generally when you restrict the wages of elected officials it just makes it to where only the upper class can afford to serve. I’d much rather them have an above average wage and benefits package, but highly regulate their ability to make alternative income by any other means.