Plata's prominent local presence led regional peasant sectors to nominate him as their representative in the Legislative Assembly, with the Movement for Socialism sponsoring his successful candidacy for a seat in the Chamber of Deputies.

During this time, Plata became active in local community leadership, participating in events and meetings convened by the Villa Exaltación neighborhood council.

By 2005, Plata had risen to become jach'a mallku cantonal, the highest indigenous authority of the sector, representing the three ayllus that make up the Urinsaya Marka.

After a public event in the Taraco Municipality where each contestant presented their proposals and initiatives, Plata was finally selected from among the contenders to represent the Ingavi Province on the ballot.

[8][9] Plata was among the many legislators who protested the decision, presenting in his final days in office a bill to suspend electoral authorities who "put at risk" the rights of Bolivian citizens to participate in politics.