[1] Bullerjahn began his political career for the Social Democratic Party (SPD) at the communal level.

Bullerjahn began to question his approach, and sought conversations with economic researchers (Wirtschaftsforscher).

Over the next 11⁄2 years, he wrote a paper consisting of strategies for sustainable consolidation of finances by financial politics through 2020: Zukunftsorientierte Finanzpolitik bis 2020.

[2] As Minister of Finances, he pursued a strict savings policy (Sparpolitik), to not only avoid more debt, but to reduce the existing, which he managed over the last three years in office.

He was criticised, also within his party, for reducing the number tax offices and prisons, and for providing less support of cultural and scientific institutions, among others.