BERLIN, March 27 (Reuters) - Airports and bus and train stations across Germany were at a standstill on Monday, causing disruption for millions of people during one of the largest walkouts in decades in Europe's biggest economy as soaring inflation stokes wage demands. Employers have offered 5% more wages over a period of 27 months and a one-off payment of 2,500 euros ($2,700) - proposals unions, which are calling for a double digit rise, call unacceptable amid inflation which reached 9. Data presented to ECB policymakers last month and reported on exclusively by Reuters showed that companies were raising prices in excess of their costs at the expense of consumers and wage earners