However, one of the consequences of Pitta's disastrous administration in São Paulo, was that it left the São Paulo municipality mired in debt, as such drawing attention to Maluf's and his former protégé's management practices: in the words of a Brazilian professor at the end of Pitta's term, "Sao Paulo's corruption has been transformed into a public horror from the whispered-about horror it always was". That called eventually for judicial scrutiny of Maluf's policies, especially his public works, his relentless extension of "the city's Paulo's unmitigating concrete sprawl". One notable example of the allegations of corruption that surfaced around Maluf was the Ayrton Senna tunnel, which passes underneath Ibirapuera Park and cost more, per kilometer, than the Channel Tunnel (it is alleged that the tunnel cost over US$400 million more than it should). Under dispute is Maluf's personal wealth, which critics attribute to his involvement in corruption scandals; supporters, conversely, point to a legitimate origin of such wealth in his family's companies – namely the mamoooth plywood trust Eucatex.