China has had a generous pension scheme that is largely unfunded and runs on a pay-as-you-go (PAYG) basis.

中国一直采取慷慨的养老金方案。该方案在很大程度上没有基金储备，以现收现付的形式运作。

youdao

Sources of China IPD orientated from two defined benefit pension schemes, one is social pooling account based on PAYG, the other is individual account based on FUND.

中国IPD来源于两个规定受益的养老金计划：现收现付制（PAYG）的社会统筹帐户和基金制（FUND）的个人帐户。

youdao

I'm told that incurs a charge of Oyster PAYG.

BBC: Paddington walk incurs ?4.60 erroneous Oyster charge

Virgin Media will also launch a Pay As You Go (PAYG) service in early 2013, with daily, weekly and monthly passes4, giving Tube passengers a range of options about how to get online underground.

ENGADGET: PSA: Virgin Media extends London Underground WiFi again, aims for 120 stations by early 2013

Our wholesale agreement with EE and Vodafone will keep the majority of Tube users connected for no extra cost and every Londoner and visitor can choose from affordable PAYG options with free, up-to-the-minute travel, news and entertainment for everyone.

ENGADGET: PSA: Virgin Media extends London Underground WiFi again, aims for 120 stations by early 2013